These videos are extremely helpful! Probably, the only channel where the content is concise yet exhaustive, and most importantly, explained in impeccable english.
Sir, you are hero to many aspirants like me. Even now, your concept is not even a match to others. Thank you soo much sir. Pls provide videos like this in all aptitude concepts
The last one could be solved in an easier way I guess. By using, Time = Distance / Speed, let speed be x 80 mins = 3500 meters / x x = 3500 / 80 = 175 / 4 (on simplification) Further, 5 / 7 of x = 175 / 4 (Since it is 5 / 7 of actual speed and OF always means multiplication in Maths) So, x = (175 * 7) / (4 * 5) = 245 / 7 = 61.25 ANSWER!
Nice and a helpful video for cat preparing ones got few concept cleared which i cant understood previously from any one it feels as if we r getting a live lecture waiting to see more from u sir thanks a lot guiding us
Great video! If I could add a suggestion about something that would have helped me. When you set up the problem 3/2D-D=15 the logic was a bit unclear. I would set it up first as 3/2D=15+D and explain as 50% more distance traveled is equal to an additional 15 miles to the original distance. Then you can move the D over algebraically to 3/2D-D=15. Again, this could only be me personally, but might help some people reading comments.
Video is really helpful. thnx for uploading. Last question needs correction... Multiply with 1000 and divide by 60 as to convert units from minutes to hours
Can you please solve this with your method::Two coal carts, A and B, started simultaneously from opposite ends of a 400-yard track. Cart A traveled at a constant rate of 40 feet per second; Cart B traveled at a constant rate of 56 feet per second. After how many seconds of travel did the two carts collide? (1 yard = 3 feet)
Looking forward to next videos on TSD. I was finding TSD difficult. But your video has helped me alot. Please upload the next videos soon.. I am waiting.. :)
In the question with Matt, at 26:00 why do we take Distance as constant? Can't we also assume time to be constant? I realise taking Distance as constant makes the calculation easier but I'm curious if there's any other reason?
The last question can be solved directly by S = D / T Suppose x is the original speed, then here S = ( 5x/7); D = 35 km, T = 1.333 hr. Hence, the ans is 36.75 km / hr. which is equivalent to 612.5 m / min.
Vicky Rage Hi Vicky, You see the distance travelled is different . Don't look for initial distance. Intial distance should be used only to find how much B travelled. Hope this solve your doubt
How do you come up with the values of the variables so easy? For example on #9 how did you figure T= 400/7 so fast?.....or on #3 when you easily figured 30=D and all the other questions?
A water tank is two-fifth full. Pipe A can fill a tank in 10 minutes and pipe B can empty in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely ?
How do we know which variable is constant if not mentioned in the question? In few of your examples I am not able to make out whether S or D or T is to be kept constant. Pls Help. Ty.
In the last question ..... taking original speed as X then present speed is 5/7X, dist is 35 km and timem is 80 min i.e. 4/3 hrs so 5/7X * 4/3= 35 Am I right???
A train covers a distance 90kms at a constant speed. if it increases its speed 5mt/sec its takes 2 and half hours less . what is the speed of the train. please tell me sir.
Step-1: Make all the units same. i.e, 5m/s=18km/h Step-2:Let the constant speed be "S" km/h. Hence the required equation is: 90/S - 90/(S+18) = 2.5 Step-3: If you try to solve this quadratic eqn., it will take time. So, in objective type questions put the value of "S" from each option and check which one satisfies it. Here, by hit and trial, one can easily say S=18km/h. I think you got the answer.
sir, I do have a doubt in the last problem where matt travels with 5/7 of his original speed, u have taken 35km as 3500 mts which is equals to 3.5 km... plz reply for this....
Very nice video! Just one clarification- for Nancy question, if she meets an accident midway, i.e., if the distance before accident and after accident remains same, then only this solution holds true. Pls let me know if I am not thinking right??
I do not understand. I am sorry but pls tell me if I am thinking in the right direction? If yes, then the solution you told in this video is NOT correct. I just intend to make my thought process clear, and I do not intend to point out or challenge, and hope it doesn't appears so. You have my utmost respect as yours are the best videos with best content I am watching over the internet!
Alright. Your solutions for this vedio requires that atleast one of Time, Distance or Speed is constant. For Nancy question, She goes from point A to point B and met with an accident somewhere on the way (this distance is not known). Your solution however assumes that the distance travelled before and after the accident is same, which is not true. So actually, the method in this video should not be applied to this question. I don't know where I am wrong!?
In that question the time of meeting the accident is the starting point. So we will disregard anything that happened before. The question asks original time beyond the point of accident.
Mahindar covers certain distance on a toy train.if the train moves 4kmph faster,it would take 30min less to cover the same distance.if it moved 2kmph slower,it would have taken 20min more to cover the same distance.find the distance?.......sir give me the shortcut way to solve dis
Last question is simply:
5/7 * V = 35km / 80min
so V = 35/80 x 7/5 = 0.6125 km/min
(or 0.6125 x 60 = 36.75 km/h)
These videos are extremely helpful! Probably, the only channel where the content is concise yet exhaustive, and most importantly, explained in impeccable english.
Thank you for the feedback!
Sir, you are hero to many aspirants like me. Even now, your concept is not even a match to others. Thank you soo much sir. Pls provide videos like this in all aptitude concepts
The intricacy of the relationships between D-S-T is explained so thoroughly. A sure-fire technique. I thank you.
Had to watch this twice as I am math challenged, but the concepts are really coming through. Thank you so much for your videos Pushpinder!
In the last question:
35km=35000m. and time should be converted to seconds or hours.
The moment i saw your video i felt that i can crack CAT if worked hard... Your video motivated me a lot sir.. thank you so much..:)
Best time & distance explanation i have ever came up with....!!
Awesome video Sir, as always.
At 28:00....the distance after conversion should be 35,000 instead of 3500
last question:
1km=1000 meters
so, Distance will be 35*1000=35000 meters! The answer will be then 612.5meter/min
YSosnovskaya exactly
Excellent Class sir. I really love to hear your lectures. Thanks for uploading.
The last one could be solved in an easier way I guess. By using, Time = Distance / Speed, let speed be x
80 mins = 3500 meters / x
x = 3500 / 80 = 175 / 4 (on simplification)
Further, 5 / 7 of x = 175 / 4 (Since it is 5 / 7 of actual speed and OF always means multiplication in Maths)
So, x = (175 * 7) / (4 * 5)
= 245 / 7
= 61.25 ANSWER!
Great. I solved it the same way but the time should be in seconds. Speed(m/s)
Shouldn't it be 35000 meters?
found exact video for time speed adn distance at correct time thanks pushpinder....
Nice and a helpful video for cat preparing ones got few concept cleared which i cant understood previously from any one it feels as if we r getting a live lecture waiting to see more from u sir thanks a lot guiding us
When T is constant D is directly proportional to S.
So if D gets multiplied by 3/2 so does S.
thank you sir for providing a perfect platform of concepts..
Great video! If I could add a suggestion about something that would have helped me. When you set up the problem 3/2D-D=15 the logic was a bit unclear. I would set it up first as 3/2D=15+D and explain as 50% more distance traveled is equal to an additional 15 miles to the original distance. Then you can move the D over algebraically to 3/2D-D=15. Again, this could only be me personally, but might help some people reading comments.
Video is really helpful. thnx for uploading. Last question needs correction... Multiply with 1000 and divide by 60 as to convert units from minutes to hours
Basanth Agarwal multiply with 1000,got it but divide by 60?? it was in meter/sec naa? can u explain?
Can you please solve this with your method::Two coal carts, A and B, started simultaneously from opposite ends of a 400-yard track. Cart A traveled at a
constant rate of 40 feet per second; Cart B traveled at a constant rate of 56 feet per second. After how many
seconds of travel did the two carts collide? (1 yard = 3 feet)
50 % increase means 1/2 increase which corresponds to 1 + 1/2 = 3/2
In variation type problems, is it always the case of one variable among Time, Speed or Distance is constant?
Really great video!! Thank you for your explanation!!
Looking forward to next videos on TSD.
I was finding TSD difficult. But your video has helped me alot.
Please upload the next videos soon.. I am waiting.. :)
sir please provide more video free for us .u r doing great job.
In the question with Matt, at 26:00 why do we take Distance as constant? Can't we also assume time to be constant? I realise taking Distance as constant makes the calculation easier but I'm curious if there's any other reason?
Perfectly well structured
Realllllllyyyyy its d best1...among all....concepts fully cleared.....thkewwww!! :)
It really helped in my gre exam.Thank you pushpinder gill :)
35 KM =35,000 m not 3500 m,Please make the corrections.
I love how well you explain! bloody brilliant, ur ideas! thank u :)
This is an awesome video
I think concept is important than answer. I don't think there is any need of any correction.
Very nice sir ji
i guess there is a problem with meter/sec in last question, plz sir rectify it.
Awsome video
The last question can be solved directly by S = D / T
Suppose x is the original speed, then here S = ( 5x/7); D = 35 km, T = 1.333 hr.
Hence, the ans is 36.75 km / hr. which is equivalent to 612.5 m / min.
+Soumitra Shitole Yes that's perfect.
Thank you sir,please post a video on number properties,divisibility and unit digits.that would be very helpful :)
thank u sir its really helpful for my placements exams
3/2T-T = 1/2T. You're looking for T (actual hours, I presume) so 1/2T= 1 hr. Then 1/2T*2 (b/c you want T as an integer), 1T= 2 hrs.
Vicky Rage Hi Vicky,
You see the distance travelled is different . Don't look for initial distance. Intial distance should be used only to find how much B travelled. Hope this solve your doubt
How do you come up with the values of the variables so easy?
For example on #9 how did you figure T= 400/7 so fast?.....or on #3 when you easily figured 30=D and all the other questions?
So, It seems you have to convert the variable (either inversely or directly ) according to the numerical data.
Very good lesson!
A water tank is two-fifth
full. Pipe A can fill a tank in
10 minutes and pipe B can
empty in 6 minutes. If
both the pipes are open,
how long will it take to
empty or fill the tank
completely ?
"because its a ratio and thats how you solve it". . .ahahaahhahaha
still dude that was a very helpful video clarified a lot of things, thanks!!
in maggie and john question y the time is constant??
Is time and work is same as rate and work ?
Thanks for such a great video sir !!
Easy to understand... Thxx a lot sir..!!!
Thank you for the feedback!
in the last Q. distance in 35000 not 3500 and last Q. have some mistake overall video is very help full to me thank sir very very much
How do we know which variable is constant if not mentioned in the question?
In few of your examples I am not able to make out whether S or D or T is to be kept constant.
Pls Help. Ty.
awesome sir, i have small doubt. how to u calculate Distance for 1st problem i.e., I travle for 50% more than I take 1hour more. 1.5D?
nice explanation
Sir, the answer for last problem is in meters/min after conversion the answer will be 3675 meters/sec.
a train which length 40m passed a palteform in 10sec, which lenth is 100m .what is the speed of train.
+amit kumar bharti 140/10 = 14m/s
is there any other video on TSD Sir............
sir wer is ur next video 1 on this time and speed topic ...... pls reply me
hey i like ur videos bt can u tell me y they r not downloading
thank you so much.. evrythng seems to solve easily now.. thankx!!
in the first question why did you multiply distance with 1.5? 50%=0.5.....Isn't it?
very good video, Thank you sir!!!!!!!
In the last question .....
taking original speed as X then present speed is 5/7X, dist is 35 km and timem is 80 min i.e. 4/3 hrs so
5/7X * 4/3= 35
Am I right???
hello sir..
i m unable to find 2nd video of TSD and distance...ur video's are really very helpful...
A train covers a distance 90kms at a constant speed. if it increases its speed 5mt/sec its takes 2 and half hours less . what is the speed of the train. please tell me sir.
Step-1: Make all the units same. i.e, 5m/s=18km/h
Step-2:Let the constant speed be "S" km/h. Hence the required equation is: 90/S - 90/(S+18) = 2.5
Step-3: If you try to solve this quadratic eqn., it will take time. So, in objective type questions put the value of "S" from each option and check which one satisfies it.
Here, by hit and trial, one can easily say S=18km/h. I think you got the answer.
How could i watch the next video on time speed and distance?
can you upload more videos on time and distance and also on problems on ages
in case of sultan u could had directly solved by 4x=20 so x=5 since x=5 multiply 10 by 5 u get the answer directly....
61.25 m/sec or m/min ??
wow...................awesome thanks
For the last math - we aimed to find the answer in m/s but the time was kept in minutes
sir, I do have a doubt in the last problem where matt travels with 5/7 of his original speed, u have taken 35km as 3500 mts which is equals to 3.5 km... plz reply for this....
Thankyou Very much sir, its relly helpfull.
I think tome should be in second as we have taken distance in meter..and distance should 35000 meter.
sir will you please upload boats and streams topic...
ur awesome :) I am loving it....
Awesome!
i think there supposed to be IF before sultan in that sultan question...........
LAST QUESTION in the video:
answer should be 611.5 m/min.
??why you took 35km as 3500 meters
In maggie and John Question... How time is constant?
coz distance is only constant i guess! its clearly mentioned 100 kms...
Vry nic sir
Very nice video! Just one clarification- for Nancy question, if she meets an accident midway, i.e., if the distance before accident and after accident remains same, then only this solution holds true. Pls let me know if I am not thinking right??
Yes
I do not understand. I am sorry but pls tell me if I am thinking in the right direction? If yes, then the solution you told in this video is NOT correct. I just intend to make my thought process clear, and I do not intend to point out or challenge, and hope it doesn't appears so. You have my utmost respect as yours are the best videos with best content I am watching over the internet!
Hi,
Thank you for your comment. Can you elaborate the question?
Alright. Your solutions for this vedio requires that atleast one of Time, Distance or Speed is constant. For Nancy question, She goes from point A to point B and met with an accident somewhere on the way (this distance is not known). Your solution however assumes that the distance travelled before and after the accident is same, which is not true. So actually, the method in this video should not be applied to this question. I don't know where I am wrong!?
In that question the time of meeting the accident is the starting point. So we will disregard anything that happened before. The question asks original time beyond the point of accident.
Good one!!!
How come 50 % as 3/2 ?????
Where is part 2...
Thank you.
Mahindar covers certain distance on a toy train.if the train moves 4kmph faster,it would take 30min less to cover the same distance.if it moved 2kmph slower,it would have taken 20min more to cover the same distance.find the distance?.......sir give me the shortcut way to solve dis
4s/s/2=(20+t)/(30-t)... Cant think of any better shortcut
Very helpfull !!
again, how is 3/2=50%?
3/2 is 1.5 which is 1 + .5 (that is a .5 x 100 = 50 % increase)
best one
kinda long video but still somewhat helpful if you somehow remember all of it. no offense XD
I am from Bangladesh.I can not watch all of your vedios.please response,How can I watch all of your vedios from here?
very helpful thank yu
also not converted min to sec in last question
In nancy's question how i think T should be 100 not 60
Please upload simplification
Too gooD!!
thank u sir ....
I didn't exactly understand how the 3/2 D & 3/2 S came when T is constant!!! :(
sir In last question the distance is 35000 accidentally u written 3500
Wow Nimmy paul..thats nice..i like u too...