Surface Area Half Cylinders

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[@priya200328]

I added 12.56+20+31.4 why did I get 63.96?

[@tonyale4]

He didn't multiply the 12.56 by 2 in part 1 to place in memory. Therefore the answer is miscalculated less12.56 which should have derived to an answer of approximately 76.53.

[@priya200328]

You don't need to multiply by 2. (3:06)

[@g.l.avlogs1600]

I'm more confused now

[@shamzy460]

listen a bit more

[@elfiraakhmedova8183]

This is wrong, You have to add 12.56 twice. Because thats the surface area of the two bases. So the answer would actually be 76.52

[@CAS-lh2tt]

Elfira Akhmedova actually the formula for the area of a 1/2 circle is 1/2*pi*r*r. He never divided his answer by 1/2, he took a short cut and left it as a whole circle, therefore, he had already "added" it twice, so your answer is wrong. I do think he should'nt taken the short cut because the answer will be off 1/100 th of a percentage.

[@bobrichards421]

No. He right. Remember, he is calculating half the cylinder. 12.56 equals the surface area of 1and 3.

[@guptaaditya5510]

there can mistakes be done by tecmath vedio

[@janavukicevic4896]

I really don't get it at all

[@shamzy460]

pay attention UwU but try watching it again you might understand wait this is 4 years ago

[@Misbaah]

@@shamzy460 lmao

[@silvergrain3993]

cant you just find the area of a full cylinder and half it?

[@tecmath]

No - the face is additional

[@alfredocadionjr.7519]

wrong answer...

[@edith7747]

This guy is a legend

[@hoorkhan9521]

First of all he said divide not multiply so 12.56/3

[@hoorkhan9521]

So he is right

[@manojlamichhane4092]

xlant

[@gausselim1474]

Everyone knows that the area of a rectangle is Length X Width. In this case then the area of part 2 would be 2 X 5 which would equal 10. For some reason here, he took 4 X 10, doubling twice of one side. Everything else is correct. The final answer is 53.98.

[@jasperruiz225]

i think you meant to write 63.98 the width would be 4 since 2 is only the radius which is half of the diametre

[@bobrichards421]

No. You are wrong. The area for number 2 is 4x5. The diameter is 4 not 2.

[@shirleyanne3498]

2 is the radius and we r supposed to use diameter so 4 × 5

[@muhammadishraf1993]

I very WEAK in this topic X|

[@priya200328]

This method does not work for my cylinder????????

[@nchaitu2003]

Good video

[@electrichorror6642]

I'm not stupid but sometimes it takes me forever to get things my concentration sux

[@terraequum]

waw don't believe there are people that have problems with this...

[@lovepassion5913]

Ur voice is horrible.can't get what u are saying. that makes it not to understand