Not even that would save the question. The vertical movement of the cable alone takes up the entirety of it's length. Just use the Pythagorean theorem, drawing two right triangles in the spaces between the cable and respective pole. Pythagorean theorem: A^2+B^2=C^2 Let A equal height and C equal cable length: 2(40^2+B^2)=80^2 Distributing the 2 80^2+(2)B^2=80^2 Subtracting 80^2 from both sides: (2)B^2=0 Finding square root of both sides: 2(B)=0 Dividing both sides by 2: B=0 B, the distance between the poles, is equal to 0. My work isn't perfect, the triangles have curved hypotenuses in the diagram, but that would only elongate them, and the issue is that no hypotenuse is shorter than either of the triangle's other sides
@@dartingralaughter9781 “…a fool who’s willing to solve it” there fixed that for you lol But seriously, I think we’re all aware this question is only meant for programming positions and implying it’s for their many factory jobs is just a joke from OP
its not crazy logic, the cable is 80 meters right? it's connected at each end at 50m tall. if you fold the cable in half it's 40m long, 50 - 40 = 10m off the ground. that's all it is.
I get what you’re saying but knowing the answer to this has nothing to do with knowing your rights. I know my rights but no fcking way I would have figured this one out.
LOL, Don't worry these type of questions won't be asked at places you go to interview anyway. Keep it up with your conspiracy theory sh*t and crappy job
I tried to solve this, got 0, can confirm. Thought I was doing it wrong, but na, using x^2 = y^2 +z^2 I got 40^2 = 40^2 + z^2, its not technically a triangle but it would average out.
@@Neumonics429yeap my qsn was just use a parabola, and a bit of calcilua to solve it. these quirky clever shortcut solutions dont cut it and are bad training, i prefer smart standard general solutions. My first problem with any question is usually to classify it first not just hurry up and solve it
Yah, but we can treat it like a triangle because we are using the whole length. If we needed to solve for one part, or if the wire changed weights half way through then we couldn't. But we are assuming the wire is constant, the two poles are the same exact height and that all of the 80ft of wire is used. Which means half the wire is on one side and half is on the other. If we derive that shape I guarantee its a triangle, which is what we would need to do if we wanted to find the the answer using calculus.
they dont give this questions to the ppl doing real work in the company, this is for the ones that refactor a block of code on monday then play minecraft on the company server for the rest of the week
Inform your manager and then rewatch the Amazon non-pro-union informational video to reinforce a good Amazon associate mindset that helps everyone instead of an unhelpful union priority that doesn't love the shareholder, the customer, and most importantly, the associate.
Im assuming this is for a position as a software engineer/programmer (could definitely be wrong but its the only context where this makes sense.) It may not seem applicable at all but its more about seeing how your mind works in solving this problem. Many times in this circumstance the answer doesnt really matter, its more about showing how you visualize the problem and how you work to a solution.
I'm a blue collar mook that spent ten years in manufacturing, now I'm a mechanic. Questions like these at my level are just opportunities for the interviewer to make themselves feel smart.
@@josedorsaith5261 It's not actually about being a threat to managements jobs but it's more about identifying individuals who might leave the job for something more lucrative sooner than later and not wasting resources training them. It's a bout retention. I worked for Pearson writing testing prompts like this for companies who contracted with us and even for the DoD for the ASVAB for the military placement. This is what they always wanted to know, how can we separate applicants into ontological segments of our preestablished choosing?
While it might not apply to your field, I can think of at least three applications for quick reasoning like this in blue collar jobs off the top of my head.
Easy question; solution:- Height of pole:- 50 Distance of the rop from ground:- 10 Distance bw the tops of the poles and the vertex of the parabolic shape :- 50-10= 40 , therefor the length of the hanging part of the rope is 40 which is half the total length of the rope, and this can only happen when the rope is completely folded(which can only happen when the poles are 0m appart. Here you have the answer
another way to solve it is Pythagoras them. a^2+b^2 =c^2 Because it's 10m from the ground we can subtract 10 from 50 to get the height of the pole if the cable was touching the ground, so we get 40. The cable is touching the ground now, so it's half of the cable forms long side of the triangle 40^2 +b^2 = 40^2 b^2 = (40^2)-(40^2) b^2 = 0 b=0 The distance of the half the cable is 0m meters from the pole if 40m was the height of the pole. x2 is still 0. Add the 10 meters back.
@@vanillaglue aha, now apply heat to it. Suddenly your math is just numbers on a paper and has nothing to do with real life. You DO know that this exact situation DO happen in summer time EVERY year? OMG...take a walk.
My robotics mentor sent this to us to figure out. People started randomly guessing when they couldn’t figure it out until this one sophomore just said zero and we all thought he was joking until our mentor said he was right. He said he created a model with sticks and string and used a ruler to scale it. When we asked how he thought of that he said “If math is just a way to understand the world, then why not just use the world?” Sickest quote I’ve ever heard.
@@MaxIronsThird when you’re in a room with a bunch of nerds you realize they tend to overthink things like this. “Asking how he thought of that” is more about his method than the actual answer.
Yeah but you can just think it through. How long is half an 80m rope, 40m. How high is the ropes anchor, 50m. How far down 50m would the rope dangle if folded in half, 40m. 50m-40m=10m. Therefore the rope would have to be folded in half to be 10m off the ground. For the rope to be folded in half the poles would have to be touching
Visual trickery is why you never should take a visual representation seriously. Once you've eliminated the 10m and considered the base point as one where the 80m cable hangs from two 40m poles and hits the ground then you'll understand the cable is going straight down from one pole then straight up from to the other.
The simple math is to look at it like 2 right triangles. In order for the wire to be off the ground by 10m the side of the triangle(the rest of the pole) is 40m (50-10). But there are 2 triangles so each side is 40m. The problem is the whole cable is 80m so the hypotenuse of the triangle if logically cut in half would be 40. A^2 + B^2 = C^2 40^2+ B^2 = 40^2 B the half the distance between the poles is 0 0*2=0
I had the same thought process, but you technically can't apply the pythagorean theorem as directly as you did to this because a hypotenuse cannot be the same length as a leg, and we already know the hypotenuse has to be 40m because it's 80/2. But you can use it to arrive at the right conclusion. You just can't "show your work" with it like that.
This is what I started with and then realized that a hypotenuse for a side of 40m would have to be more than 40, which is longer than the cable could be.
@@NaegimagguYou're bang on throwing trig at this, thinking in terms of approximations and limits is the best way to solving many math/physics problems. The wrong way to approach this is to sit there trying to find the clever solution first
@@Rodolfowei12345Pythagoras works. It's not whether the rope forms a perfect triangle that matters. It's the exact lengths of the segments that it's giving us. The middle of a 80m rope, is always 40mm. And so is 50m -10m. You can draw perfectly imaginary lines between these points and the magic of geometry will do the rest.
High school math. Another way to solve it is Pythagoras theorem. a^2+b^2 =c^2 Because it's 10m from the ground we can subtract 10 from 50 to get the height of the pole if the cable was touching the ground, so we get 40. The cable is touching the ground now, so it's half of the cable forms long side of the triangle 40^2 +b^2 = 40^2 b^2 = (40^2)-(40^2) b^2 = 0 b=0 The distance of the half the cable is 0m meters from the pole if 40m was the height of the pole. x2 is still 0. Add the 10 meters back.
The cable is generally not in a straight line, it follows a hyperbolic cosine arc. You cannot apply the Pythagorean theorem for this problem in general. The only reason it gives the right answer this time is because the cable happens to be perfectly straight when the poles are 0m apart.
@@andrewkarsten5268 no, my solution doesn't assume they are 0m apart, read it again. It works because the line folds perfectly at the mid point. It's a heuristical workaround solution that works perfectly in this instance. I don't need a scalpel to slice a tomato in half, a pocket knife works just fine. That's one of the beauties of math They're testing for creative solutions, and this is one. You just have to break the problem down in familiar terms. I know you said "in general", but also it's not an applied engineering problem, it's a paper math problem where I can reduce the line to two triangles. Solve the hypotenuse and double it.
@@vanillaglue you clearly misunderstood my comment. Your solution assumes the cable is straight from the pole to the midpoint and it generally is not, and it is only straight when the poles are 0m apart or 80m apart so it just happened to give you the right answer in this problem. And what you did is not using a pocket know to slice a tomato, it is more akin to trying to hammer in a screw. Yes one of the beautiful things of math is problems generally have multiple correct approaches, but this is not one. You assume the cable is straight in your solution, and the cable is not unless the poles are 80m or 0m apart. They just happen to be so in this problem so it gave you the right solution anyway, but if you think this is a valid approach you are wrong. You got lucky that the wrong math gave you the right answer.
It would test if you take random visuals seriously or if you verify, which is relevant. Still many of these are to see you articulate your thinking to see if you will fit in a team.
I kinda prefer my way: - Form a right triangle from the top of one of the poles to the nadir of the cable. - It’s vertical side is 40 m. - Its hypotenuse connects the same points as a half segment of the slack cable. - This half of the cable is 80 / 2 = 40 m in length - The hypotenuse, being a line connecting the same points as the nonlinear cable segment, is thus less than 40 m in length. - This is a contradiction: a hypotenuse cannot be shorter than either of the triangles sides. To me, this explanation makes way more sense than saying that “the posts are 0 m apart.” That characterization doesn’t reflect the physical impossibility of this problem’s scenario.
I worked as a TA in university and one of my TA colleagues asked me this question. I did it with calculus and the resulting parabola had an infinite x sqauared coefficient. At that point I said something like ”I guess I messed something up, because this looks like the line basically goes straight down and up and that can’t be right.” Que the laughter of my colleagues.
It's a professor Layton level of question. It's intentionally confusing to find autismos and make sure they don't get hired. You're supposed to get it wrong. The more you know!
I did the calculations assuming few factors like tension in the cable and weight of the cable per unit length. And a sag of 40m. It works at least theoretically.
Exactly bro 😂, I legit always either over think it or under think it. It’s so annoying, it’s to the point where I do both for every problem I come across and usually I’ll be on the right track but dayum 😂
On God, I was like well let's do a reverse arc length and find the curve for that catenary since for some ungodly reason solids don't hang in parabolic curves, and this is some bs arithmetic
For anyone interested, Hyperbolic Cosine is the function you would use to describe a hanging rope or chain (not a parabola). This is also called a Catenary if you want to google it. Obviously the answer didnt require knowing that, but it's still interesting to know in my opinion.
@@tonyc1938The answer is still zero. What this person is informing us of is the shape that the cable would actually take rather than the parabola demostrated! On that note, thats very cool. I was thinking of using arc length formula (the one with the integral from a-b etc) to figure out the distance until I realized the answer was that simple
alternatively you can use the pythagorean theorum to prove it by simply noting that the distance from the top of the pole to the 10 meters is just half of the length of the pole (80/2 = 40) and subtract the length of the cable to the ground from the length of the pole (50 - 10 = 40) to get a right triangle with one side having a length of 40 and the hypotenuse having a length of 40, input it into the pythagorean theorum to get 40^2 + x^2 = 40^2 which means that x must be 0 and 0 x 2 = 0, therefore ? = 0
You also introduce a luck factor. Many of the smartest employees you could possibly hire might be stumped by this, but someone not so good might see it immediately. That being said, it might only be one of many questions.
@@jama211some people practice specifically this sort of puzzles, so they may have come across the same one, or at least get familiar with the most typical gotchas they're based on. usually it has virtually nothing to do with the actual job, but big companies can afford having ridiculous hiring policies because they've got so many talented candidates knocking at their door that they could only hire people born in winter (for example), and they'd still do just fine.
@@jama211 Agreed. I'm above-average IQ but I over-analyze everything. I went straight to wondering if there was a formula to calculate the drop of the wire between the poles without actually stopping and looking at if the wire would even reach across the gap with the measurements given. It's obvious now that the wire goes 40m straight down then 40m straight back up with 0m distance between the poles, but I always seem to go for the most difficult route to solve any particular problem.
...*its own way. No possessive apostrophe needed. Both in a sentence: It's crazy that it ate its own apostrophe. it's = it is its = shows the 'it' owns/possesses something What's funny is I didn't learn this difference until I went through high school (AP English class), 6 years of college, and became an English teacher abroad. Next challenge: everyday vs. every day
@@ItchyKneeSon I hate English, and definitely never took AP English. But I learned (idk what grade) that the " ' " shortens the word (or whatever it's called) So, don't = do not Won't = will not Doesn't = does not But I'm sure you already know all this. So I always remember how to use any word that has a " ' " in it by saying the combined words out loud, and seeing if it sounds right. What I'm saying is I don't think it takes a degree and AP classes to understand the difference. You just had to pay attention, and a lot of people didn't. I'm pretty sure I learned this in 2nd grade or something. I see people confusing their, there, and they're still. I know your comment was directed at the original comment, but I just wanted to put in my two cents. As for the "every day" and "everyday" I'm assuming it would mean: Every day: something that happens each and every ---------- day. Everyday: something like I go to the bathroom everyday. Or that's what I'm assuming. Idk I'm not an English teacher 🤷♂️
@@drinkinclear3100 because it primes you to think there's at least some distance between them. If you end up at 0 meters it's one of those answers that just seems logically wrong. It's like how you'd sometimes get an answer on a test that was like "David ran 5234.456 km/hr" which is obviously the wrong answer doesn't it doesn't make logical sense. The point of contextualizing math questions in this way is to also test reading comprehension and logic - if I took this question and got 0 meters, I'd just assume it was wrong because of how the question is framed.
Finally someone who gets it. I have very poor math skills, but just looking at this at a glance I would guess that they are 80 meter apart and full length, but because the rope is hanging 10 meters from the bottom up, then I would just guess 70m LOL
Both ends are 50 meters high, the lowest it can go is half it's length since both points are the same height. 50-10=40, which is the maximum length the cable can droop and it can only droop that low if they're right next to each other.
I believe the ans is 18m As tension is missing from wire..so. lets approx ,it 82 , i e41 on each side The we got triangles with sidess 41,40(50-10) .? By pyhtagoras, ?=9 on each side
Cable, phone, & internet companies measuring from the road (pole A) to your house (pole B) 200ft away "The cable length we measured is *380ft* & the price per foot is..."
OK I love this one. The best riddles are the ones when you slap your forehead and go "of course!". The answer is blatantly obvious. They just dressed it up well. Phillip.
“You don’t need crazy math for this” Bro pulls out simulation software Edit: It’s just a joke. I get it. How dare someone make a joke on the internet about something so elementary. Before you comment you’re right. You are the most educated person to walk this Earth. You are a secret Genius, severely under appreciated. You’re right again, your intuition is correct, I wasn’t joking, I’m just an idiot. You are so smart you could see through my mask of jokes, it totally isn’t your Egos controlling you, and enabling your desire to assert your intellectual dominance over nothing, that could never be. 🤣
The logic part would be if the cable is 80m long and attached at its two end points, how far could it ever droop towards the ground? The answer is only half its length, as the other half returns up to the pole. Since half is 40m, and the poles are 50m, we can figure out the poles are next to each other But yea, he should have explained that part lol
@@louistrinh3608 he used simulation software to show that and I'm saying he shouldn't have. Not sure what your comment is supposed to mean in regards to that.
He uses a visual way to explain it because it's a video, and a visual animated demonstration is a better way to use this medium. The animation simply visualized what he said.
The minimum bend radius of a real life cable, or even a simulated one using splines or beziers, would form a loop at the bottom preventing it from reaching the max droop.
Paraphrased a bit differently, if the cable is 80m long and it sags right in the middle, this means the left and right side are exactly 40 meters long. If it sags 10 meters above ground, it also means that that the lowest point is 40m from the top. In other words, each half of the cable is 40 meters long and it sags 40 meters down, which is absolutely the most it can reach length-wise, so the poles must be together with no distance apart
They never ask stupid questions like this - only those related to the job. This is just some made up scenario to match interview questions of yore like "why are manhole covers round".
In another way of thinking without the use of Desmos. The maximum height where the cable is attached is 50m, and the minimum height of its curve or midpoint of cable is 10m, and the half length of cable is 40m(80/2). If 50m - 10m = 40m, then x should be 0. This is because if the half-length is equal to the maximum attached height of the cable minus the minimum height of the curve at midpoint, then the cable must be perpendicular to x.
To make it super simple. 80m cable is split between 40m each pole. If the cable is 10m short of 50m that means the 40m cable is hanging straight down. 80/2=40 50-10=40 For 40m of cable to run 40m it must be straight.
Your answer helps only if the question wasn't also given along with a visual representation to the question. The visual drawing of the question in this video shows a much lengthier cable than 80m given that the poles are 50m tall. If you were to cut the cable at the center from where it is hanging then both cables would touch the ground proving the cable is longer than 80m. I believe this question is trying to see if you can look outside the box of objectivity similar to math jokes. In either case this is not an Amazon question and this video is click bait
@@obliviondioSorry. A not to scale representation is pretty standard on grade school math competition. Indeed, any attempt to draw it on your part world also not be to scale. These sorts of questions test mental flexibility and acuity.
@@thenatureofnurture6336 I remember in grade school they would have trick questions similar to these from what you've read compared to what you see. Therefore I won't agree since even in grade school these type of trick questions existed in many different forms. For instance there was a test spelling out colors with the wrong color associated with the colored name. You were to announce the color in class which played with the mind. The test in the video is no different. Then there's also the tricky questions that are looked at in a mathematicians point of view compared to a realist point of view. Such as...... Two people enter a house. Time passes. After a while three people leave the house. In a mathematicians perspective they would say "if one more person enters the house then it will be empty". If you assume that the answer to the question in the video is purely based on objective math even when a physical drawing is provided then the calculated answer based on math Could be incorrect when the correct answer Could be based more on the drawing. This is where clarity needs to be given by the teacher. If it is purely math or perhaps the visual. It may be the case where the teacher won't tell just to see how you will handle the question.
@@thenatureofnurture6336 I have to disagree. In grad school I've had similar questions just like these in other forms that test to see if you've read the entire sentence thoroughly or perhaps spelled out a word representing a color other than what you saw on paper. There's even questions about perspective that you can see as a mathematician compared to the literal sense. Perhaps this question is wanting to see if you would answer by choosing to go off the written formula while disregarding the visual when the real answer is the visual instead. Here's a math only question.. There are 3 apples in a basket and you take away 2. How many apples do you have now? Mathematically the answer is 3. The non-mathematical answer is 1.
As someone who's worked in Amazon in a networking-adjacent position (high enough to be salaried and have free control over my office hours), never got asked anything like this. The most technical questions I was asked were directly related to the work I had to perform for my position
God I'd love to work in a good tech job when I'm older, do you have any advice for me? I'm 17 and a rust programmer, made a few projects but worried about getting a good job
@jumbledfox2098 I'm not OP, but am similar to him as far as work style, set hours, I have a team of 70 people under me. Its not easy, you work for shit pay and you sacrafice a lot in your younger years. You might work 100 hours or more a week for a year straight, you might need 2 or 3 jobs to pay the bills. But you will learn something everyday and at some point an opportunity will present itself. Once you find it, youll know it was all worth it. I now make great money, get a great pension contribution, company vehicle, 6 weeks holidays per year, and Im a lot younger then you might expect. Good luck.
@@jumbledfox2098Don't stop practicing and learning. Multiple languages can help too. And do not underestimate the value of a good school. Even for coding, a school can be incredibly important on a resume, especially for a large corporation like Amazon. One of my best friends works there now and pulls in mid 200s and isn't even 30 yet. He just bought a house in Denver. Myself I make about half that but I traded salary for the ability to work whenever and wherever and like only three to 12 hours a week if I'm honest.
If a blue collar job has interview questions like that, they are more likely looking for people that can't figure it out. They don't want workers that are smarter than their bosses, they want people that just do what they are told.
There's a much simpler mathematical way to explain this. And I drive a truck for a living. If the polls are 50 m tall and the cable is dipping to 10 m that means 40 m of cable are dipping between each pole and since there are two poles and the center of the cable is at 10m you add both sides of the cable from the center being equidistant, 40 m and 40 m, then add them, 80m... your cable distance is 80 M so the distance between the poles must equal zero.
I looked at the problem and said "ok, what if i moved everything down 10m so that the cable is touching the ground? that would produce two right triangles." these right triangles would have a height of 40 (50-10) and a hypotenuse of 40 (80/2). a^2 + b^2 = c^2, 40^2 + b^2 = 40^2, the only value of B that solves this equation is 0.
@@Ammarsafwan7 I can't answer that question because I don't understand it. You appear to be asking if we can shorten the cable by 10 meters, and then somehow use it as a leg, not the hypotenuse, in one big right triangle. I literally cannot comprehend what you're asking. Could you explain further?
@@Destructaconn the poles and wires can create 2 triangles and we need to find its hypotenuse,80m - 10m to get the wire to the ground. Divide it by 2 and we get the hypotenuse for each triangle 70/2 = 35,then 35² - 50² = c² wait I don't think this make sense 🤔
Yeah just kinda realizing that the entirety of the cables length gets used up in the vertical leaving none left for the horizontal. Did no math to get it
same as Andy. Show me any cable which can be bend like this to get same result. have you ever seen 80m long cable? You need at least 1m to make 180°. Incorrect input data :) But still he explained that way to scientifically. Just use pythagoras and you would get answer faster than he moves poles together. Lowest point in middle. 80/2=50-10 =>0
Since this is a relatively famous puzzle I think, I'd love to see an interview for some job that uses a lot of complex math use this problem, but change the 10 to 15 so they actually need to solve it mathematically lmao
Well I would just approximate it with triangles. That's what I initially tried to do here and saw that the side and hypotenuse were equal. So the other side was zero and the poles were on top of each other. So for 15 above, x^2 + 35^2 = 40^2. So you get about 39. No need for complex math involved to get a first order approximation.
You can thank bureaucrats and leftist woke bastards for you thinking this way instead of just thinking about it logically first. I'm old enough to rem when logic was first. A few grades into school they started pushing us to show the work and if we didn't arrive at the right answer the way they wanted us to, it was wrong. I got a lot of shit wrong/right because the way they pushed was way harder and didn't make sense to me. Now all that shit has a place. So, you haven't wasted your time in college learning it, but it certainly isn't needed for simple logic. That's where todays school fucks up. They don't teach common sense anymore. Learn the algorithm and pass this test so the school can get more money. Bullshit. I would argue the schools with lower scores need more money. They could get better teachers and supplies. But that would again be common sense and therein lies the problem. The next thing with this money going to each student instead of the school, teachers can work privately. Take on 10 kids and make 100k a year. Who's going to want to be a public school teacher then. They already can't afford to live in the district they teach in in most cases. It's all about to get much worse.
I solved the problem by cutting the cable in the middle. Half of the cable then hangs down parallel to the pole and its end is 10 meters above the ground. The only way to get the both halves of the cable into this position is to join the poles together.
This problem becomes much simpler after you realise it is not drawn to scale. It gives some thought about how perspectives can be deceiving us into perceiving problems as more difficult than they truly are. Working in a a corporate environment it is actually so often that issues are distorted to appear substantially more difficult, due to the distorted perspectives of senior management, often unintentionally.
I worked at Amazon for 6+ years and interviewed dozens of people during that time and I have never once heard of anyone at Amazon using silly questions like this in their interviews. Furthermore, the instructional training we receive before being put on interview loops firmly discouraged us from using this type of interviewing because it was just not a good indicator of fit with the Amazon culture. Instead we were encouraged to dive deeply into their experience and look for those who embodied the leadership principles that Amazon has published. I would expect these kinds of questions in a Google interview, but definitely not Amazon.
It’s a bait video, trick interview questions aren’t really a thing anymore. If someone actually gives you trick interview questions, you probably don’t want to work for that person anyway.
Not sure why big companies are now so against any sort of logical tests, majority of positions are not about "leadership" and "culture", they're about getting shit done correctly and efficiently. I guess that's why so much of corporate workforce is just bloat.
These questions have also been banned in Google interviews since the '00s for the same reason (they were sometimes a thing in the early days, which is the origin of this now-myth) -- random brain teasers and trivia questions don't consistently speak to the candidate's ability to perform in the role unless they're interviewing for a riddle writing position.
@@Abstract_zx amazon includes peers in their interview process, so they don't necessarily have to be HR. Also the initial hiring interview can consist of 5 ×1 hour interviews Amazon has a specific policy of not asking this sort of trick question, and care more about 1) technical competency and 2) "leadership principles"
The fact that you would need "relatively" advanced maths like integrals or hyperbolic formulas should tell you that there's a trick if this isn't specifically a math test
Absolutely, yes. thank you for this easy explanation. can you explain it if the cable was 20m off the ground? Based on your explanation, I would automatically assume the poles are 10m apart, but I am having troulbe comprehending it/visualizing it
@@MonstersFlyinginTheSkythe 10m is a given number. We are also give the length of the rope to be 80m. Lastly, we are told the height of the poles are 50m. So if you cut the 80m rope in half, this will create 2 ropes, 40m each (80/2=40). Now 50m-40m= 10m, and thus, the poles must be at 0m distance since we are told the 10m in the beginning
You don't need software to do this either. The cable length to reach the centre (from each post) is the height it reaches down, plus half the distance between the post, and then add the two figures together. If the cable reaches 40m down from each post, and it is only 80m in total, the posts must be right next to each other
In my head I did; 50-10 for the height of the triangle, giving me 40. 80/2 for the length of the wire giving me 40. Then solved for a by modifying Pythagorean. c^2 - b^2 = a^2. Which gave me 0. And that answer freaked me out. But it seems like I was right lol.
I don't think you need to bring Pythagoras into this mess. With the logic you used, you can figure out that there are 2 lengths of cable, each 40 m long. If they're 10 m off the ground and hanging from 50 m high, that means each half of the cable is perfectly straight. The only way this is possible is if they're hanging straight down, and the only way *that's* possible is if both poles are essentially on top of each other, so the distance, logically, is 0 m
Right...for the one where you get to drive an electric van, sweating your arse from external heat and worry of running out of battery even without using a/c because if you do then you have to rent a van on your own expense to deliver rest of cheap chyners shieeet.
@@aaabbb-rn6sj I'm in IT, if a recruitment officer asks me a gotcha question like this I walk out. Fuck that shit, this is not something you notice in a real world scenario. You apply the normal formulas and then you realise something is weird. That's how it works, and there is nothing wrong with it.
"Well, you passed the test. Congratulations. Now go unpack 100 pallets in the next 30 minutes and you'll have all the watered down Dr Pepper you can drink! No bathroom breaks!"
50m is enough height to start having an effect where the tips are further apart than the bases due to the curvature of the Earth. The poles cannot occupy the same space meaning placed next to each other the cable could never be 10m from the ground as the separation at the tips of the poles would raise the cable slightly. A way around this is dig the poles into the ground, then you could place your poles anywhere from next to each other and (almost) 80m apart (cannot be 80m again because of the curvature of Earth) and then bury the poles until the cable is 10m off the ground.
The Poles are always closer than you might think. You wouldn't believe how fast they can move with all that armour on those horses when they get excited.
If you’re still confused: you can also imagine it more physically, Just imagine putting both ends of the cable on the same pole. 40m down, 40m up. You can’t really calculate it with that method but that’s just another side of proof for those who have a hard time with this demo.
@@joshnic6639 it’s a trick question. I’ve always felt off about those questions, because on one hand. You could say “since they figured it out, they thought outside the box” but I feel like it’s just as good to say “they didn’t get the answer right, because they remained in the boundaries that the question provided” Personally I wouldn’t put that question on my interview(if I had one) but if I had no choice but to give it, I would also give immense consideration based on their response.
and you can even use right angle triangle math, if you wanted to check it. a^2 + b^2 = c^2, and the 50 becomes 40 because of the 10 height. so 40^2 + b^2 = 40^2 ----> b = 0
That MAKES NO SENSE AT ALL! I can visually look at the polls and tell they are farther apart than zero. I think all y’all are smoking dope. IM 100% SERIOUS! PLEASE EXPLAIN how something can be apart but yall say they are together?
the correct answer is “it’s impossible”. its a way to screen for people who have good intuition, logical thinking skills, and are not afraid to question an authority figure. also screens for the ability to mentally interpret mathematical concepts which is a good indicator of an educated person.
this specific problem can be solved intuitively by just knowing that a cable hanging between two points on equal level will only ever be able to hang down completely at half of the cable's length. Take a string and fold it in half what do you get? A string half of the length of the first one obviously. So knowing that, if the max length the cable can hang down is just 40m (80/2), and the cable in the problem was hanging down 40m down (50-10), then the two poles must be touching each other because the cable is folded in half. Edit: But for a disclaimer, this solution will not work unless the 80m cable is hanging 10m off the ground. Just a heads up
This was an assumption I knew I was able to make about the vertex of the rope, but didn't recognize the significance of until after realizing that the only way the hypotenuse of a right triangle could be the same length as one of its sides is if the third side was 0.
Since you’re trying to punish this explanation, it’s your turn for the same treatment. The video didn’t cover the logic by intuition it covered it by using graphing tools which u wouldn’t have on an interview. The solution this dude wrote is exactly the way this problem needs to be thought of. Your comments lets everyone know you completely missed the point. In the future, you should just avoid writing insulting comments under the responses of others since they will more than likely make you look the fool every time.
@@Celestial_Wellness I'm not trying to punish his solution at all? I just shared how I answered the problem. If the cable was not hanging 10m above the ground my "intuitive" solution will fail definitely.
I got this by using Pythagoras theorem. If you draw a parallel line that passes by the lowest point, you have kinda of two triangles with a 90° angle each one. The hypotenuse is 40m and the pole from that new line to the top is also 40m. If the hypotenuse is the same lenght that one of the others sides, it turns out this triangle is actually impossible. By the Pythagoras Theorem, you have 40² = 40² + c² c² = 40² - 40² c² = 0 c = 0 The only way to have a isoceles triangle with a 90° angle, is the sides being the same length, turning the hypotenuse = √(2 × c²), c being the sides. By the triangle existence condition, having two sides 40m, the other value (i will continue call it c) can only be |40 - 40| < c < 40 + 40 0 < c < 80. That means, with these conditions (two sides 40) we can have only triangles with the third side greater than 0 and less than 80. It means we have an infinite possibilities for this triangle, but none of them is with side 0. I know it's kinda obvious though 😂😂 The Pythagoras Theorem says the only "possible" right triangle with both one side and hypotenuse same side is the other one being 0. It's enough to say it's impossible, but you can prove it's impossible by the existence of triangle condition. The point is if they are at least 0,001 m apart, it would be an existing triangle, but it's not a right triangle anymore
Shows how you can sometimes get the right answer by solving it the wrong way. You will not get the right answer if the height of the cable at the lowest point were, let’s say, 20m.
What this question is testing is the application of a first principle technique called "boundary conditions". You evaluate the edge cases of the problem. Here they are if the poles are farthest and when they are closest. The other hint is Amazon is not in the business of laying down cables so you can be pretty confident they are not expecting you to calculate the equation of a caternary
I’ve been a lineman for 30 years. Thank god I wasn’t asked that question when I hired on. Who knows what I’d be doing now. Couldn’t work at Amazon either.
You don't need ANY kind of trig to solve this...just basic addition and subtraction. The length from the top of the poles to the bottom of the "sag" is 40 (50 - 10)...but since 40 is also half the distance of the cable (80/2), that means the cable has to be hanging straight down, so they have to be side-by-side. Tap the EZ button.
This is why the phrase "not drawn to scale" is important on a test question.
Took it to a whole another level 😂 ☠️😂
Not even that would save the question. The vertical movement of the cable alone takes up the entirety of it's length. Just use the Pythagorean theorem, drawing two right triangles in the spaces between the cable and respective pole.
Pythagorean theorem:
A^2+B^2=C^2
Let A equal height and C equal cable length:
2(40^2+B^2)=80^2
Distributing the 2
80^2+(2)B^2=80^2
Subtracting 80^2 from both sides:
(2)B^2=0
Finding square root of both sides:
2(B)=0
Dividing both sides by 2:
B=0
B, the distance between the poles, is equal to 0.
My work isn't perfect, the triangles have curved hypotenuses in the diagram, but that would only elongate them, and the issue is that no hypotenuse is shorter than either of the triangle's other sides
Scale doesn't really affect the question
Scale would not affect this problem, you have all the data you need in numbers, formulas wouldn't even be necessary.
@@Beaver_Rapsmith
It kind of does, because my answer would be “Well, these poles are about 2-1/2” apart on this paper.”
"You want me to drive this forklift or not?" would be my answer.
Then they say no and you lose the job to someone who is willing to solve it
@@dartingralaughter9781 “…a fool who’s willing to solve it” there fixed that for you lol
But seriously, I think we’re all aware this question is only meant for programming positions and implying it’s for their many factory jobs is just a joke from OP
Pretty sure this is for software developers not warehouse employees
I've been a software engineer for 15 years and this question has never been relevant
lmfao
"You dont need crazy math for this, you just need logic" *provides logic even crazier than the math*
nah not crazier than using cosh
its not crazy logic, the cable is 80 meters right? it's connected at each end at 50m tall. if you fold the cable in half it's 40m long, 50 - 40 = 10m off the ground. that's all it is.
@@ploopy8780 Holy Shit Damn
Math IS logic though
@@ploopy8780 thanks you literally explained it better than he did 😂
Plot twist: If you got the wrong answer, you're immediately hired. They don't want people who are smart enough to know their rights.
Same way with cops. Can't be too smart, otherwise you don't make a good bully.
dont think this question is for a warehouse worker or driver lol
Good point
I get what you’re saying but knowing the answer to this has nothing to do with knowing your rights. I know my rights but no fcking way I would have figured this one out.
LOL, Don't worry these type of questions won't be asked at places you go to interview anyway. Keep it up with your conspiracy theory sh*t and crappy job
If I got this question on a test and got 0 for my answer I would be second guessing myself for the entire hour
I tried to solve this, got 0, can confirm. Thought I was doing it wrong, but na, using x^2 = y^2 +z^2 I got 40^2 = 40^2 + z^2, its not technically a triangle but it would average out.
@@Neumonics429yeap my qsn was just use a parabola, and a bit of calcilua to solve it. these quirky clever shortcut solutions dont cut it and are bad training, i prefer smart standard general solutions. My first problem with any question is usually to classify it first not just hurry up and solve it
Yea i thought about using trigonometry but then i was like how is (40)^2=(40)^2 +x^2. I didnt even think that x would actually be 0
It's hyperbolic cosine not triangle
Yah, but we can treat it like a triangle because we are using the whole length. If we needed to solve for one part, or if the wire changed weights half way through then we couldn't. But we are assuming the wire is constant, the two poles are the same exact height and that all of the 80ft of wire is used. Which means half the wire is on one side and half is on the other. If we derive that shape I guarantee its a triangle, which is what we would need to do if we wanted to find the the answer using calculus.
Amazon asks questions like this to make sure you're qualified to piss in gatorade bottles to avoid losing your job for going to the bathroom.
This is probably a question for the engineers.
Diapers are way more comfortable.
they dont give this questions to the ppl doing real work in the company, this is for the ones that refactor a block of code on monday then play minecraft on the company server for the rest of the week
People forget that Amazon is a big tech company just like Google or Microsoft. This is probably for software engineers working on AWS.
@@kewlhotrod Diapers cost a lot more money, which you don't have, because you work for Amazon.
Actual Amazon Interview Question: "A group of workers are talking about starting a Union. What do you do?"
Inform your manager and then rewatch the Amazon non-pro-union informational video to reinforce a good Amazon associate mindset that helps everyone instead of an unhelpful union priority that doesn't love the shareholder, the customer, and most importantly, the associate.
@@zxcvbnmasdfghjkl3377 "You are hired....Oh wait before that are you forklift certified?"
Change their status to “ex-employee” yesterday
Unions are such a communist thing...
I’d say hell yes! Where do I sign? 💪🏼
"Sir, Im just here for the interview to put things in cardboard into bigger pieces of cardboard"
Lmfao
- How does this even help me with my job?
- Cable management
Im assuming this is for a position as a software engineer/programmer (could definitely be wrong but its the only context where this makes sense.) It may not seem applicable at all but its more about seeing how your mind works in solving this problem. Many times in this circumstance the answer doesnt really matter, its more about showing how you visualize the problem and how you work to a solution.
@@DisDatK9Yeah
@@DisDatK9yeah
@@DisDatK9Yeah
@@DisDatK9what you said lol
I'm a blue collar mook that spent ten years in manufacturing, now I'm a mechanic. Questions like these at my level are just opportunities for the interviewer to make themselves feel smart.
its critical thinking matched with highschool math, two skills that are in short supply.
And it's a way of identifying people who might be a threat to management's jobs
@@josedorsaith5261 It's not actually about being a threat to managements jobs but it's more about identifying individuals who might leave the job for something more lucrative sooner than later and not wasting resources training them. It's a bout retention.
I worked for Pearson writing testing prompts like this for companies who contracted with us and even for the DoD for the ASVAB for the military placement. This is what they always wanted to know, how can we separate applicants into ontological segments of our preestablished choosing?
It is also a poorly written question.
While it might not apply to your field, I can think of at least three applications for quick reasoning like this in blue collar jobs off the top of my head.
Easy question; solution:-
Height of pole:- 50
Distance of the rop from ground:- 10
Distance bw the tops of the poles and the vertex of the parabolic shape :- 50-10= 40 , therefor the length of the hanging part of the rope is 40 which is half the total length of the rope, and this can only happen when the rope is completely folded(which can only happen when the poles are 0m appart.
Here you have the answer
another way to solve it is Pythagoras them. a^2+b^2 =c^2
Because it's 10m from the ground we can subtract 10 from 50 to get the height of the pole if the cable was touching the ground, so we get 40.
The cable is touching the ground now, so it's half of the cable forms long side of the triangle
40^2 +b^2 = 40^2
b^2 = (40^2)-(40^2)
b^2 = 0
b=0
The distance of the half the cable is 0m meters from the pole if 40m was the height of the pole. x2 is still 0. Add the 10 meters back.
@@vanillaglue aha, now apply heat to it.
Suddenly your math is just numbers on a paper and has nothing to do with real life.
You DO know that this exact situation DO happen in summer time EVERY year?
OMG...take a walk.
Thanks
Yea I don’t think that’s right
@@Blento0404otnelB bro it's a line on a paper, not a steel cord lmaooo. This isn't an applied engineering question, it's a simple math problem.
My robotics mentor sent this to us to figure out. People started randomly guessing when they couldn’t figure it out until this one sophomore just said zero and we all thought he was joking until our mentor said he was right. He said he created a model with sticks and string and used a ruler to scale it. When we asked how he thought of that he said “If math is just a way to understand the world, then why not just use the world?” Sickest quote I’ve ever heard.
Nice
This is a simple question though.
@@MaxIronsThird when you’re in a room with a bunch of nerds you realize they tend to overthink things like this. “Asking how he thought of that” is more about his method than the actual answer.
@@Myrtilos_Waffle sorry
"We can think through this logically" "Uses an advanced graphing utility with sliders"
Yeah but you can just think it through. How long is half an 80m rope, 40m. How high is the ropes anchor, 50m. How far down 50m would the rope dangle if folded in half, 40m. 50m-40m=10m. Therefore the rope would have to be folded in half to be 10m off the ground. For the rope to be folded in half the poles would have to be touching
Yes, because using a visual display in an educational short is against the rules of thinking logically 😂
you are not included in "we", you are the reason the visual is shown
He said "but"
@@BenEllick the problem is how can you assume that at 0 m distance the rope hangs at 10m?
Visual trickery is why you never should take a visual representation seriously. Once you've eliminated the 10m and considered the base point as one where the 80m cable hangs from two 40m poles and hits the ground then you'll understand the cable is going straight down from one pole then straight up from to the other.
Also to do that problem would require knowledge of the equation of a catenary so there has to be a twist if it is simply a mental arithmetic problem.
"Diagram is not to scale"
“You never should take a visual representation seriously”
You’re gonna be great in the field 😂
Thank you. This guy's explanation didn't help
@@ussliberty109I hate when the graphs in math test papers do this, they are just so misleading
Dishonest question with the poles drawn so far apart.
Not true. These questions are used all the time on math tests in high school. You clearly failed those classes
you probably skipped the math classes. the answer is ALWAYS 0.
well it just makes you think a bit more, thats the point
Anybody with half a brain skipped as much public school as possible
The simple math is to look at it like 2 right triangles. In order for the wire to be off the ground by 10m the side of the triangle(the rest of the pole) is 40m (50-10). But there are 2 triangles so each side is 40m. The problem is the whole cable is 80m so the hypotenuse of the triangle if logically cut in half would be 40. A^2 + B^2 = C^2
40^2+ B^2 = 40^2
B the half the distance between the poles is 0
0*2=0
I had the same thought process, but you technically can't apply the pythagorean theorem as directly as you did to this because a hypotenuse cannot be the same length as a leg, and we already know the hypotenuse has to be 40m because it's 80/2. But you can use it to arrive at the right conclusion. You just can't "show your work" with it like that.
A catenary cable is a hyperbolic cosine graph.
This is what I started with and then realized that a hypotenuse for a side of 40m would have to be more than 40, which is longer than the cable could be.
Honestly if Amazon is asking me this during an interview, I'm out. 😂
i think they hire the people who get it wrong anyways lol
@@zachmoyer1849 correct, questions like this are designed to assess your problem solving process, not your solution
@@zachmoyer1849they only ask these questions to people who are trying to work STEM jobs. If you get it wrong you still have a chance though.
This is a recycled question Google used to use.
@@benischeall big tech recycle each others. google isn't special
I had to go all Pythagoras on this to realize they're right next to eachother.
But the process is not right pitagoras only works on this specific case or if they were 80m apart, as the wire does not form a perfect triangle
@@Rodolfowei12345yeah, but it’s close enough
@@Rodolfowei12345 Of course it doesn't, but it's an easy approximation to start off with.
@@NaegimagguYou're bang on throwing trig at this, thinking in terms of approximations and limits is the best way to solving many math/physics problems. The wrong way to approach this is to sit there trying to find the clever solution first
@@Rodolfowei12345Pythagoras works. It's not whether the rope forms a perfect triangle that matters. It's the exact lengths of the segments that it's giving us. The middle of a 80m rope, is always 40mm. And so is 50m -10m. You can draw perfectly imaginary lines between these points and the magic of geometry will do the rest.
It not being drawn to scale is deceiving similar to a magic trick, not fair.
High school math. Another way to solve it is Pythagoras theorem. a^2+b^2 =c^2
Because it's 10m from the ground we can subtract 10 from 50 to get the height of the pole if the cable was touching the ground, so we get 40.
The cable is touching the ground now, so it's half of the cable forms long side of the triangle
40^2 +b^2 = 40^2
b^2 = (40^2)-(40^2)
b^2 = 0
b=0
The distance of the half the cable is 0m meters from the pole if 40m was the height of the pole. x2 is still 0. Add the 10 meters back.
The cable is generally not in a straight line, it follows a hyperbolic cosine arc. You cannot apply the Pythagorean theorem for this problem in general. The only reason it gives the right answer this time is because the cable happens to be perfectly straight when the poles are 0m apart.
@@andrewkarsten5268 no, my solution doesn't assume they are 0m apart, read it again. It works because the line folds perfectly at the mid point.
It's a heuristical workaround solution that works perfectly in this instance. I don't need a scalpel to slice a tomato in half, a pocket knife works just fine. That's one of the beauties of math
They're testing for creative solutions, and this is one. You just have to break the problem down in familiar terms.
I know you said "in general", but also it's not an applied engineering problem, it's a paper math problem where I can reduce the line to two triangles. Solve the hypotenuse and double it.
@@vanillaglue you clearly misunderstood my comment. Your solution assumes the cable is straight from the pole to the midpoint and it generally is not, and it is only straight when the poles are 0m apart or 80m apart so it just happened to give you the right answer in this problem.
And what you did is not using a pocket know to slice a tomato, it is more akin to trying to hammer in a screw.
Yes one of the beautiful things of math is problems generally have multiple correct approaches, but this is not one. You assume the cable is straight in your solution, and the cable is not unless the poles are 80m or 0m apart. They just happen to be so in this problem so it gave you the right solution anyway, but if you think this is a valid approach you are wrong. You got lucky that the wrong math gave you the right answer.
Thanks to my genius IQ I was able to pass this Amazon interview and now I'm pissing in bottles for minimum wage.
Don’t pretend they’re paying minimum wage, it devalues the legitimacy of the ridiculous working conditions.
@@ryanmurphy9663 shut up nerd
Ok child they pay more than minimum wage actually. @@ryanmurphy9663
amazon pays better than minimum wage
@@janthran Our minimum wage is equivalent to $15.30 USD. Other countries exist.
I love when I get asked a trick question that has nothing to do with the job at all
It would test if you take random visuals seriously or if you verify, which is relevant. Still many of these are to see you articulate your thinking to see if you will fit in a team.
they also don't ask gotcha questions at all, they ask a bunch of behavioral questions
your feelings are irrational
My option to walk out @@Fire_Axus
They want to see how you think
I kinda prefer my way:
- Form a right triangle from the top of one of the poles to the nadir of the cable.
- It’s vertical side is 40 m.
- Its hypotenuse connects the same points as a half segment of the slack cable.
- This half of the cable is 80 / 2 = 40 m in length
- The hypotenuse, being a line connecting the same points as the nonlinear cable segment, is thus less than 40 m in length.
- This is a contradiction: a hypotenuse cannot be shorter than either of the triangles sides.
To me, this explanation makes way more sense than saying that “the posts are 0 m apart.” That characterization doesn’t reflect the physical impossibility of this problem’s scenario.
This short carrying my self esteem at 5 am
I worked at Amazon and never had to do math for an interview
Source? What position are you?
@The_TylerDurden_Narrator💀
@@zenedhyr7612 “this doesn’t happen I worked there”
“Source?”
“I….fucking worked there?”
@@levitheguy6086 yeah, but like the 2nd guy said, different position may have different interview method
Yea if you actually worked at a technical position not an errand boy
I worked as a TA in university and one of my TA colleagues asked me this question. I did it with calculus and the resulting parabola had an infinite x sqauared coefficient. At that point I said something like ”I guess I messed something up, because this looks like the line basically goes straight down and up and that can’t be right.”
Que the laughter of my colleagues.
this is how *actually* smart people react to that question.
I don't think it would be a parabola.
Cue
Whats the method of solving it with math?
It's a professor Layton level of question. It's intentionally confusing to find autismos and make sure they don't get hired. You're supposed to get it wrong. The more you know!
For me, I would likely to side rant into a whole history of how Galileo once thought this hanging wire was parabolic.
I did the calculations assuming few factors like tension in the cable and weight of the cable per unit length. And a sag of 40m. It works at least theoretically.
Calculus classes have got me thinking too far outside the box 😅
Exactly bro 😂, I legit always either over think it or under think it. It’s so annoying, it’s to the point where I do both for every problem I come across and usually I’ll be on the right track but dayum 😂
Pl@@AmmoBops
LMAOO, I immediately tried to find a triangle and use trig functions to figure it out
And there is me trying to integrate to find the area under the cable.
On God, I was like well let's do a reverse arc length and find the curve for that catenary since for some ungodly reason solids don't hang in parabolic curves, and this is some bs arithmetic
For anyone interested, Hyperbolic Cosine is the function you would use to describe a hanging rope or chain (not a parabola). This is also called a Catenary if you want to google it. Obviously the answer didnt require knowing that, but it's still interesting to know in my opinion.
Thanks, lad!
So the answer isn’t zero
Searched for this answer 😂
@@tonyc1938The answer is still zero. What this person is informing us of is the shape that the cable would actually take rather than the parabola demostrated! On that note, thats very cool. I was thinking of using arc length formula (the one with the integral from a-b etc) to figure out the distance until I realized the answer was that simple
I wonder how many people care about your opinion
alternatively you can use the pythagorean theorum to prove it by simply noting that the distance from the top of the pole to the 10 meters is just half of the length of the pole (80/2 = 40) and subtract the length of the cable to the ground from the length of the pole (50 - 10 = 40) to get a right triangle with one side having a length of 40 and the hypotenuse having a length of 40, input it into the pythagorean theorum to get 40^2 + x^2 = 40^2 which means that x must be 0 and 0 x 2 = 0, therefore ? = 0
I ALMOST got there, but gave up when I started thining the answer was 0 and didnt make sense to me.
Interview questions like this are for when hiring managers have absolutely no idea what they are doing, and don't know who to hire.
You also introduce a luck factor. Many of the smartest employees you could possibly hire might be stumped by this, but someone not so good might see it immediately. That being said, it might only be one of many questions.
@@jama211some people practice specifically this sort of puzzles, so they may have come across the same one, or at least get familiar with the most typical gotchas they're based on.
usually it has virtually nothing to do with the actual job, but big companies can afford having ridiculous hiring policies because they've got so many talented candidates knocking at their door that they could only hire people born in winter (for example), and they'd still do just fine.
@@jama211 Agreed. I'm above-average IQ but I over-analyze everything. I went straight to wondering if there was a formula to calculate the drop of the wire between the poles without actually stopping and looking at if the wire would even reach across the gap with the measurements given. It's obvious now that the wire goes 40m straight down then 40m straight back up with 0m distance between the poles, but I always seem to go for the most difficult route to solve any particular problem.
Q: When do hiring managers _have_ an idea of what they want?
A: When they aren't actually hiring managers, and instead do actual work.
Ditto with leetcode questions when they're hiring node.js monkeys
Trick question, weeds out anyone smart enough to question the horrific working conditions to reduce complaints. Clever in it's own way.
If you don't have the abstract thought capacity to realize this question isn't for laborers then you ironically would fit in with them.
This is for the software engineering side of Amazon. Amazon is one of the the A's in FAANG. They're a giant tech company.
@@Weaver_GamesIt's MANGA now since Facebook changed to Meta.
...*its own way.
No possessive apostrophe needed.
Both in a sentence:
It's crazy that it ate its own apostrophe.
it's = it is
its = shows the 'it' owns/possesses something
What's funny is I didn't learn this difference until I went through high school (AP English class), 6 years of college, and became an English teacher abroad.
Next challenge: everyday vs. every day
@@ItchyKneeSon I hate English, and definitely never took AP English. But I learned (idk what grade) that the " ' " shortens the word (or whatever it's called)
So, don't = do not
Won't = will not
Doesn't = does not
But I'm sure you already know all this.
So I always remember how to use any word that has a " ' " in it by saying the combined words out loud, and seeing if it sounds right.
What I'm saying is I don't think it takes a degree and AP classes to understand the difference. You just had to pay attention, and a lot of people didn't. I'm pretty sure I learned this in 2nd grade or something. I see people confusing their, there, and they're still.
I know your comment was directed at the original comment, but I just wanted to put in my two cents.
As for the "every day" and "everyday" I'm assuming it would mean:
Every day: something that happens each and every ---------- day.
Everyday: something like I go to the bathroom everyday.
Or that's what I'm assuming. Idk I'm not an English teacher 🤷♂️
Logic was way more difficult than the maths.
Mom: why didn't you get the job?
Son: 2 poles were far apart
Visual representation should never be that bad
for real that is the most confusing graphic.
I don’t understand why the visual representation would confuse you if you don’t need the visual to get the answer
@@drinkinclear3100 because it primes you to think there's at least some distance between them. If you end up at 0 meters it's one of those answers that just seems logically wrong.
It's like how you'd sometimes get an answer on a test that was like "David ran 5234.456 km/hr" which is obviously the wrong answer doesn't it doesn't make logical sense. The point of contextualizing math questions in this way is to also test reading comprehension and logic - if I took this question and got 0 meters, I'd just assume it was wrong because of how the question is framed.
@@crossmarian773that’s the point, it’s meant to be a trick question. Amazon is all about metrics and solving things with data, not assumptions.
@@apolace7242 I know, I'm just answering why the visual would confuse people despite not actually needing the visual to answer the question
"John here got it right out of thousands applicants! Here you go, $10/h"
Thousands*. No $10 for you
Aaaaand you're fired for taking a bathroom break
McDonald’s literally starts at $21/hr
@@francisco.segura loool!
@@Clevelandsteamer324 and they don't ask impossible questions. Haha
Interview question should be "How would you dodge our robot shelves that travel at the speed of intent to kill"
Okay so now what if the cable is 17.5 meters from the ground? This is why I like math
Being observant from different angles to avoid overthinking something and find a simpler solution, is the test here.
Finally someone who gets it.
I have very poor math skills, but just looking at this at a glance I would guess that they are 80 meter apart and full length, but because the rope is hanging 10 meters from the bottom up, then I would just guess 70m LOL
@@Daniel-uq1yp Finally some who gets it wrong.
half of 80 is 40 and 40 + 10 is 50 so that just means it's straight up and down
Both ends are 50 meters high, the lowest it can go is half it's length since both points are the same height. 50-10=40, which is the maximum length the cable can droop and it can only droop that low if they're right next to each other.
It's almost as if the video said that
@@danielobrien5255it does, this is the difference between showing your work and not.
I believe the ans is 18m
As tension is missing from wire..so. lets approx ,it 82 , i e41 on each side
The we got triangles with sidess 41,40(50-10) .?
By pyhtagoras, ?=9 on each side
What? @@harshbisht6557
Exactly my logic!!
Cable, phone, & internet companies measuring from the road (pole A) to your house (pole B) 200ft away "The cable length we measured is *380ft* & the price per foot is..."
"Sorry, you're not qualified to tape boxes shut"
Imagine applying to the warehouse and they start making you do math 🤣
More logic than math
In an 8 hour shift you get two bathroom breaks, but because there may be a lot to do, subtract 3.
How many bathroom breaks do you get?
Your hired.
This is a question for those who have brains, not box packers
Imagine being so uneducated that you assume this is for the warehouse workers. I did stuff like this for Amazon when I worked in their data centers.
If you get it right you don't get hired. If you can figure this out you definatly will figure out they're fluffing you.
Other trick : you visualized the cable by a parabola but cables don’t follow a parabola curve
They follow y = cosh(x) :)
@@bridgeon7502also known as a "catenary"
Why not, could you elaborate?
Hanging ropes follow a equation called "catenary". In it's simpler form, it's the hyperbolic cosine, but it has some complexity added to it
@@rohanbaste-bania6227 I'm guessing they mean in general
One thing I learned about companies that administer tests they're just trying to pay you the lowest they can
OK I love this one. The best riddles are the ones when you slap your forehead and go "of course!". The answer is blatantly obvious. They just dressed it up well.
Phillip.
“You don’t need crazy math for this” Bro pulls out simulation software
Edit: It’s just a joke. I get it. How dare someone make a joke on the internet about something so elementary. Before you comment you’re right. You are the most educated person to walk this Earth. You are a secret Genius, severely under appreciated. You’re right again, your intuition is correct, I wasn’t joking, I’m just an idiot. You are so smart you could see through my mask of jokes, it totally isn’t your Egos controlling you, and enabling your desire to assert your intellectual dominance over nothing, that could never be. 🤣
The logic part would be if the cable is 80m long and attached at its two end points, how far could it ever droop towards the ground? The answer is only half its length, as the other half returns up to the pole. Since half is 40m, and the poles are 50m, we can figure out the poles are next to each other
But yea, he should have explained that part lol
@@Twizzzums he should have showed us how to solve it in the interview sans simulation software.
@@DadeMurphie The cable is half when you fold it in half. 80m>40m. So the poles are next to each other.
@@louistrinh3608 he used simulation software to show that and I'm saying he shouldn't have. Not sure what your comment is supposed to mean in regards to that.
He uses a visual way to explain it because it's a video, and a visual animated demonstration is a better way to use this medium. The animation simply visualized what he said.
The minimum bend radius of a real life cable, or even a simulated one using splines or beziers, would form a loop at the bottom preventing it from reaching the max droop.
Paraphrased a bit differently, if the cable is 80m long and it sags right in the middle, this means the left and right side are exactly 40 meters long. If it sags 10 meters above ground, it also means that that the lowest point is 40m from the top. In other words, each half of the cable is 40 meters long and it sags 40 meters down, which is absolutely the most it can reach length-wise, so the poles must be together with no distance apart
He said it really well, if you fold cable , its half is 40m and 10m above surface so no distance between both ends of cable
people be thinking this is for the warehouse jobs on the floor, yet they also have other jobs. this might be in some engineering or IT interview
They never ask stupid questions like this - only those related to the job. This is just some made up scenario to match interview questions of yore like "why are manhole covers round".
Engineering at Amazon?
Yet they still make you piss in bottles, even in those jobs
If anyone asks you why manhole covers are round, ask them if they ever lifted one.
They engineered a clamping funnel that fits on the Gatorade bottles so they wouldn't piss down their leg
In another way of thinking without the use of Desmos.
The maximum height where the cable is attached is 50m, and the minimum height of its curve or midpoint of cable is 10m, and the half length of cable is 40m(80/2).
If 50m - 10m = 40m, then x should be 0. This is because if the half-length is equal to the maximum attached height of the cable minus the minimum height of the curve at midpoint, then the cable must be perpendicular to x.
So wt would be the answer if it was 20m at the bottom using the same method
When you swear there is an IQ restriction to bring hired, then question your own.
for those who didn't understand you can apply pythagorus theorum in it by drawing the triangle there than you will get it
To make it super simple. 80m cable is split between 40m each pole. If the cable is 10m short of 50m that means the 40m cable is hanging straight down.
80/2=40
50-10=40
For 40m of cable to run 40m it must be straight.
Your answer helps only if the question wasn't also given along with a visual representation to the question. The visual drawing of the question in this video shows a much lengthier cable than 80m given that the poles are 50m tall. If you were to cut the cable at the center from where it is hanging then both cables would touch the ground proving the cable is longer than 80m.
I believe this question is trying to see if you can look outside the box of objectivity similar to math jokes.
In either case this is not an Amazon question and this video is click bait
@@obliviondioSorry. A not to scale representation is pretty standard on grade school math competition. Indeed, any attempt to draw it on your part world also not be to scale. These sorts of questions test mental flexibility and acuity.
@@thenatureofnurture6336
I remember in grade school they would have trick questions similar to these from what you've read compared to what you see. Therefore I won't agree since even in grade school these type of trick questions existed in many different forms. For instance there was a test spelling out colors with the wrong color associated with the colored name. You were to announce the color in class which played with the mind. The test in the video is no different. Then there's also the tricky questions that are looked at in a mathematicians point of view compared to a realist point of view.
Such as...... Two people enter a house. Time passes. After a while three people leave the house. In a mathematicians perspective they would say "if one more person enters the house then it will be empty".
If you assume that the answer to the question in the video is purely based on objective math even when a physical drawing is provided then the calculated answer based on math Could be incorrect when the correct answer Could be based more on the drawing. This is where clarity needs to be given by the teacher. If it is purely math or perhaps the visual. It may be the case where the teacher won't tell just to see how you will handle the question.
Yeah this is a better explanation, just seeing the graphs doesn't help me understand the problem at all
@@thenatureofnurture6336
I have to disagree. In grad school I've had similar questions just like these in other forms that test to see if you've read the entire sentence thoroughly or perhaps spelled out a word representing a color other than what you saw on paper. There's even questions about perspective that you can see as a mathematician compared to the literal sense. Perhaps this question is wanting to see if you would answer by choosing to go off the written formula while disregarding the visual when the real answer is the visual instead.
Here's a math only question..
There are 3 apples in a basket and you take away 2. How many apples do you have now? Mathematically the answer is 3. The non-mathematical answer is 1.
As someone who's worked in Amazon in a networking-adjacent position (high enough to be salaried and have free control over my office hours), never got asked anything like this. The most technical questions I was asked were directly related to the work I had to perform for my position
How did you get that job?
God I'd love to work in a good tech job when I'm older, do you have any advice for me? I'm 17 and a rust programmer, made a few projects but worried about getting a good job
@jumbledfox2098 I'm not OP, but am similar to him as far as work style, set hours, I have a team of 70 people under me. Its not easy, you work for shit pay and you sacrafice a lot in your younger years. You might work 100 hours or more a week for a year straight, you might need 2 or 3 jobs to pay the bills. But you will learn something everyday and at some point an opportunity will present itself. Once you find it, youll know it was all worth it. I now make great money, get a great pension contribution, company vehicle, 6 weeks holidays per year, and Im a lot younger then you might expect. Good luck.
@@nekikins4936 wow, thanks for the inspiration!!
@@jumbledfox2098Don't stop practicing and learning. Multiple languages can help too. And do not underestimate the value of a good school. Even for coding, a school can be incredibly important on a resume, especially for a large corporation like Amazon. One of my best friends works there now and pulls in mid 200s and isn't even 30 yet. He just bought a house in Denver. Myself I make about half that but I traded salary for the ability to work whenever and wherever and like only three to 12 hours a week if I'm honest.
If a blue collar job has interview questions like that, they are more likely looking for people that can't figure it out. They don't want workers that are smarter than their bosses, they want people that just do what they are told.
There's a much simpler mathematical way to explain this. And I drive a truck for a living. If the polls are 50 m tall and the cable is dipping to 10 m that means 40 m of cable are dipping between each pole and since there are two poles and the center of the cable is at 10m you add both sides of the cable from the center being equidistant, 40 m and 40 m, then add them, 80m... your cable distance is 80 M so the distance between the poles must equal zero.
That's how i worked it out as well💫
cool!
I looked at the problem and said "ok, what if i moved everything down 10m so that the cable is touching the ground? that would produce two right triangles." these right triangles would have a height of 40 (50-10) and a hypotenuse of 40 (80/2). a^2 + b^2 = c^2, 40^2 + b^2 = 40^2, the only value of B that solves this equation is 0.
Thank you. Your explaination make sense.
Couldn't you just 80m - 10m,then use the hypotenuse theorem. 70²-50²= c²
@@Ammarsafwan7 I can't answer that question because I don't understand it. You appear to be asking if we can shorten the cable by 10 meters, and then somehow use it as a leg, not the hypotenuse, in one big right triangle. I literally cannot comprehend what you're asking. Could you explain further?
@@Destructaconn the poles and wires can create 2 triangles and we need to find its hypotenuse,80m - 10m to get the wire to the ground. Divide it by 2 and we get the hypotenuse for each triangle 70/2 = 35,then 35² - 50² = c² wait I don't think this make sense 🤔
Yeah just kinda realizing that the entirety of the cables length gets used up in the vertical leaving none left for the horizontal.
Did no math to get it
99.99% of ALL Amazon employees failed!🤣
same as Andy. Show me any cable which can be bend like this to get same result. have you ever seen 80m long cable? You need at least 1m to make 180°. Incorrect input data :)
But still he explained that way to scientifically. Just use pythagoras and you would get answer faster than he moves poles together.
Lowest point in middle. 80/2=50-10 =>0
For those who want it worded differently, the 80m long cable would be 40m on each side if the poles were touching and 10m above the ground.
As a Pole I can say that I'm pretty far apart from other Poles.
And, once you are in, the chances of ever needing to solve this type of problem are: NEVER.
Truckers need to know this stuff because of power lines.
Since this is a relatively famous puzzle I think, I'd love to see an interview for some job that uses a lot of complex math use this problem, but change the 10 to 15 so they actually need to solve it mathematically lmao
Well I would just approximate it with triangles. That's what I initially tried to do here and saw that the side and hypotenuse were equal. So the other side was zero and the poles were on top of each other. So for 15 above, x^2 + 35^2 = 40^2. So you get about 39. No need for complex math involved to get a first order approximation.
"Look man, I'm just trying to make minimum wage here"
I paused the video and was like "that's absurd, the distance would have to be 0" only for that to be the answer
Yeah I started by trying to solve it with the hyperbolic cosine function before noticing 😵💫
Lmfao same
Lol... Yup... I made it way too complicated! 😂
Same lmfaooo
s😅 i wasnt the only one
You can thank bureaucrats and leftist woke bastards for you thinking this way instead of just thinking about it logically first. I'm old enough to rem when logic was first. A few grades into school they started pushing us to show the work and if we didn't arrive at the right answer the way they wanted us to, it was wrong. I got a lot of shit wrong/right because the way they pushed was way harder and didn't make sense to me. Now all that shit has a place. So, you haven't wasted your time in college learning it, but it certainly isn't needed for simple logic. That's where todays school fucks up. They don't teach common sense anymore. Learn the algorithm and pass this test so the school can get more money. Bullshit. I would argue the schools with lower scores need more money. They could get better teachers and supplies. But that would again be common sense and therein lies the problem. The next thing with this money going to each student instead of the school, teachers can work privately. Take on 10 kids and make 100k a year. Who's going to want to be a public school teacher then. They already can't afford to live in the district they teach in in most cases. It's all about to get much worse.
I solved the problem by cutting the cable in the middle. Half of the cable then hangs down parallel to the pole and its end is 10 meters above the ground. The only way to get the both halves of the cable into this position is to join the poles together.
This problem becomes much simpler after you realise it is not drawn to scale. It gives some thought about how perspectives can be deceiving us into perceiving problems as more difficult than they truly are. Working in a a corporate environment it is actually so often that issues are distorted to appear substantially more difficult, due to the distorted perspectives of senior management, often unintentionally.
As a Pole I can confirm we like to be exactly that far apart.
I worked at Amazon for 6+ years and interviewed dozens of people during that time and I have never once heard of anyone at Amazon using silly questions like this in their interviews. Furthermore, the instructional training we receive before being put on interview loops firmly discouraged us from using this type of interviewing because it was just not a good indicator of fit with the Amazon culture. Instead we were encouraged to dive deeply into their experience and look for those who embodied the leadership principles that Amazon has published.
I would expect these kinds of questions in a Google interview, but definitely not Amazon.
It’s a bait video, trick interview questions aren’t really a thing anymore. If someone actually gives you trick interview questions, you probably don’t want to work for that person anyway.
It is not for interviews. It is for assessment tests for mechatronics and robotics.
Not sure why big companies are now so against any sort of logical tests, majority of positions are not about "leadership" and "culture", they're about getting shit done correctly and efficiently.
I guess that's why so much of corporate workforce is just bloat.
These questions have also been banned in Google interviews since the '00s for the same reason (they were sometimes a thing in the early days, which is the origin of this now-myth) -- random brain teasers and trivia questions don't consistently speak to the candidate's ability to perform in the role unless they're interviewing for a riddle writing position.
Amazon culture 😂 so you just made the sit in a small room for hours without using the washroom?
As someone with over 7 years and over 30 interviews with Amazon I can safely call BS.
This isn't the flex you think it is
@@BR-ty3hx im guessing "over 30 interviews" implies they work in HR or moved within the company a bunch of times
What kind of questions do they actually ask?
@@BR-ty3hxwhy? As long as you aren't some skilless robot in a warehouse, Amazon pays really well
@@Abstract_zx amazon includes peers in their interview process, so they don't necessarily have to be HR. Also the initial hiring interview can consist of 5 ×1 hour interviews
Amazon has a specific policy of not asking this sort of trick question, and care more about 1) technical competency and 2) "leadership principles"
Guarantee they don't give you that tool. They want you to instinctively know it out the womb.
The fact that you would need "relatively" advanced maths like integrals or hyperbolic formulas should tell you that there's a trick if this isn't specifically a math test
Logic method:
Cut the cable in two. You have 40 meters. The cable is also 10m above the ground, which equals 40. So the distance must be 0.
Absolutely, yes. thank you for this easy explanation. can you explain it if the cable was 20m off the ground? Based on your explanation, I would automatically assume the poles are 10m apart, but I am having troulbe comprehending it/visualizing it
Could u explain how the cable being 10m above the ground makes it equal to 40? I’m an idiot
@@MonstersFlyinginTheSkythe 10m is a given number. We are also give the length of the rope to be 80m. Lastly, we are told the height of the poles are 50m.
So if you cut the 80m rope in half, this will create 2 ropes, 40m each (80/2=40).
Now 50m-40m= 10m, and thus, the poles must be at 0m distance since we are told the 10m in the beginning
@@MonstersFlyinginTheSky The height of the tower is 50. 50 - 10 = 40
An idiot wouldn't have asked anything :) thx for asking
@@MonstersFlyinginTheSky And if the cable is going straight down 40m, then the distance must be 0.
You don't need software to do this either. The cable length to reach the centre (from each post) is the height it reaches down, plus half the distance between the post, and then add the two figures together. If the cable reaches 40m down from each post, and it is only 80m in total, the posts must be right next to each other
I used the pythagorean theorem and came up with 0 and thought "no, this can't be right..."
In my head I did; 50-10 for the height of the triangle, giving me 40. 80/2 for the length of the wire giving me 40. Then solved for a by modifying Pythagorean. c^2 - b^2 = a^2. Which gave me 0. And that answer freaked me out. But it seems like I was right lol.
I don't think you need to bring Pythagoras into this mess.
With the logic you used, you can figure out that there are 2 lengths of cable, each 40 m long. If they're 10 m off the ground and hanging from 50 m high, that means each half of the cable is perfectly straight. The only way this is possible is if they're hanging straight down, and the only way *that's* possible is if both poles are essentially on top of each other, so the distance, logically, is 0 m
This for the real Amazon jobs, not the one where you piss in dark corners of a warehouse
Right...for the one where you get to drive an electric van, sweating your arse from external heat and worry of running out of battery even without using a/c because if you do then you have to rent a van on your own expense to deliver rest of cheap chyners shieeet.
@@Matt_K it’s for software devs, but keep crying about your job lol
@@aaabbb-rn6sj I'm in IT, if a recruitment officer asks me a gotcha question like this I walk out.
Fuck that shit, this is not something you notice in a real world scenario. You apply the normal formulas and then you realise something is weird. That's how it works, and there is nothing wrong with it.
@@aaabbb-rn6sj It's not even for software devs.
@@aaabbb-rn6sj If you need to feel like other people are less than you to have any value, then you've been near irreparably damaged.
"Well, you passed the test. Congratulations. Now go unpack 100 pallets in the next 30 minutes and you'll have all the watered down Dr Pepper you can drink! No bathroom breaks!"
50m is enough height to start having an effect where the tips are further apart than the bases due to the curvature of the Earth. The poles cannot occupy the same space meaning placed next to each other the cable could never be 10m from the ground as the separation at the tips of the poles would raise the cable slightly. A way around this is dig the poles into the ground, then you could place your poles anywhere from next to each other and (almost) 80m apart (cannot be 80m again because of the curvature of Earth) and then bury the poles until the cable is 10m off the ground.
Also, there's nothing to say the poles have to be perfectly straight so, I guess lean them until the cable is 10m
Thanks for your time George! Unfortunately, the team has decided to move forward with another candidate
@@monx more fool them
I'd argue it's impossible. The cable would never bend at a perfect 180 degrees.
They ask them questions like this, just for them to create the most dysfunctional work apps in existence.
The Poles are always closer than you might think. You wouldn't believe how fast they can move with all that armour on those horses when they get excited.
If you’re still confused: you can also imagine it more physically,
Just imagine putting both ends of the cable on the same pole. 40m down, 40m up.
You can’t really calculate it with that method but that’s just another side of proof for those who have a hard time with this demo.
@@skrebzilla10th whoops! Thanks for that correction, imma fix it right now. Me and my Silly 🇺🇸🦅 brain😂
Ok so, I am so very confused. How is it possible that the polls are together when they are separate?
@@joshnic6639 it’s a trick question. I’ve always felt off about those questions, because on one hand. You could say “since they figured it out, they thought outside the box” but I feel like it’s just as good to say “they didn’t get the answer right, because they remained in the boundaries that the question provided”
Personally I wouldn’t put that question on my interview(if I had one) but if I had no choice but to give it, I would also give immense consideration based on their response.
so simple, half the cable is 40m, 50-40 is 10, so it can only be 10 when it's 100% vertical, meaning it's 0m apart.
That was my logic as well...I couldn't believe it was so simple!
and you can even use right angle triangle math, if you wanted to check it. a^2 + b^2 = c^2, and the 50 becomes 40 because of the 10 height. so 40^2 + b^2 = 40^2 ----> b = 0
Well yea, when you put it that way.
That MAKES NO SENSE AT ALL!
I can visually look at the polls and tell they are farther apart than zero. I think all y’all are smoking dope.
IM 100% SERIOUS! PLEASE EXPLAIN how something can be apart but yall say they are together?
Only smart comment. Thank you
When a minimum wage general labor job requires you to have a master's degree and be a rocket scientist...these corporations are ridiculous!
the correct answer is “it’s impossible”. its a way to screen for people who have good intuition, logical thinking skills, and are not afraid to question an authority figure. also screens for the ability to mentally interpret mathematical concepts which is a good indicator of an educated person.
this specific problem can be solved intuitively by just knowing that a cable hanging between two points on equal level will only ever be able to hang down completely at half of the cable's length. Take a string and fold it in half what do you get? A string half of the length of the first one obviously.
So knowing that, if the max length the cable can hang down is just 40m (80/2), and the cable in the problem was hanging down 40m down (50-10), then the two poles must be touching each other because the cable is folded in half.
Edit: But for a disclaimer, this solution will not work unless the 80m cable is hanging 10m off the ground. Just a heads up
We know we watched the video too
This was an assumption I knew I was able to make about the vertex of the rope, but didn't recognize the significance of until after realizing that the only way the hypotenuse of a right triangle could be the same length as one of its sides is if the third side was 0.
That was not mentioned in the video lol@@AnarexicSumo
Since you’re trying to punish this explanation, it’s your turn for the same treatment. The video didn’t cover the logic by intuition it covered it by using graphing tools which u wouldn’t have on an interview. The solution this dude wrote is exactly the way this problem needs to be thought of. Your comments lets everyone know you completely missed the point. In the future, you should just avoid writing insulting comments under the responses of others since they will more than likely make you look the fool every time.
@@Celestial_Wellness I'm not trying to punish his solution at all? I just shared how I answered the problem. If the cable was not hanging 10m above the ground my "intuitive" solution will fail definitely.
I can confirm that I nor anyone I work with have ever been asked this question.
Sir do you want me to move packages for a shit wage?
Interviewer: thank you.
I got this by using Pythagoras theorem. If you draw a parallel line that passes by the lowest point, you have kinda of two triangles with a 90° angle each one. The hypotenuse is 40m and the pole from that new line to the top is also 40m. If the hypotenuse is the same lenght that one of the others sides, it turns out this triangle is actually impossible.
By the Pythagoras Theorem, you have
40² = 40² + c²
c² = 40² - 40²
c² = 0
c = 0
The only way to have a isoceles triangle with a 90° angle, is the sides being the same length, turning the hypotenuse = √(2 × c²), c being the sides.
By the triangle existence condition, having two sides 40m, the other value (i will continue call it c) can only be
|40 - 40| < c < 40 + 40
0 < c < 80.
That means, with these conditions (two sides 40) we can have only triangles with the third side greater than 0 and less than 80.
It means we have an infinite possibilities for this triangle, but none of them is with side 0.
I know it's kinda obvious though 😂😂
The Pythagoras Theorem says the only "possible" right triangle with both one side and hypotenuse same side is the other one being 0. It's enough to say it's impossible, but you can prove it's impossible by the existence of triangle condition.
The point is if they are at least 0,001 m apart, it would be an existing triangle, but it's not a right triangle anymore
I got zero by applying Pythagoras theorem but I didn't believed ans can be zero
how do you apply it here?
@@lobnophypothenuse 40, one base also 40, so find another base = √40^2-40^2= 0
@@azamatkenzhetaiuly3093 the only way i found out at the end was 80-40-40=0 is that also right?
I also used pythagorean theorem
Shows how you can sometimes get the right answer by solving it the wrong way. You will not get the right answer if the height of the cable at the lowest point were, let’s say, 20m.
What kind of Amazon employee would need this level of logic skills.
“It puts the product in the box or else it gets fired again.”
Software Engineers and that's it.
Logistics o.o idk i just went with the closest thing that sounded to logic.
What this question is testing is the application of a first principle technique called "boundary conditions". You evaluate the edge cases of the problem. Here they are if the poles are farthest and when they are closest. The other hint is Amazon is not in the business of laying down cables so you can be pretty confident they are not expecting you to calculate the equation of a caternary
This is what we need more of bro. Fantastic Job
I’ve been a lineman for 30 years. Thank god I wasn’t asked that question when I hired on. Who knows what I’d be doing now. Couldn’t work at Amazon either.
The correct answer: I would measure it with a tape measure I bought on Amazon.
You don't need ANY kind of trig to solve this...just basic addition and subtraction. The length from the top of the poles to the bottom of the "sag" is 40 (50 - 10)...but since 40 is also half the distance of the cable (80/2), that means the cable has to be hanging straight down, so they have to be side-by-side. Tap the EZ button.
I also watched the video
Roses are red, Violets are blue, I came to the comments because my brain turned to goo