00:01
So in this question we are given that there is a circular pool of diameter 6 meters and the height of the pool wall is 4 meter while the pool is 2 .5 meter deep.
00:10
First of all let's digest what is given here.
00:13
So if let's say if this is a pool right here and let me draw this.
00:21
So as for the question, the height of the walls is 4 meter but the depth of the pool is 2 .5 meter.
00:30
This means that the water is filled up to the level of 2 .5 meters.
00:34
So this is 2 .5 meter and the diameter is 6 meters.
00:41
So this is 6 meter.
00:43
So only this one is water and we need to find the work done to pump out all this water out of the pool.
00:50
So from the diagram i can see that the center of mass of this whole water will lie at the center.
00:58
So it will be 2 .5 divided by 2 which is 1 .25.
01:03
So this will be 1 .25 meters...