00:01
Hi, today we are solving the question in which height is given as 5 feet and radius is given as 2 feet.
00:08
So, in order to find the work done we will take by similarity of criteria.
00:14
So, let the elementary part is being displaced of radius x and height dy.
00:31
So, here from similarity criteria we can take x by y is equals to 2 by 5.
00:42
So, from here work will be taken as equals to work will be equal to integral from 0 to 5 of pi into x whole square into dy.
00:58
Now, substituting the values so we can get it as from integral from 0 to 5 pi into 2 by 5 whole square into y into dy.
01:15
So, here taking the constant out so we will get it as 4 by 25 pi is taken outside integral of y into dy from 0 to 5.
01:30
So, on solving it we get it as 4 by 25 pi into y square by 2 and limits are from 0 to 5.
01:41
So, here on solving it we get it as 4 by 25 pi into 25 by 2...