00:01
Hi there.
00:01
So for this problem, we have a cylindrical tan.
00:04
We are told that its height is four feet high.
00:08
So let's call this its side four meters.
00:13
And it has a radius also given its radius that is two meters.
00:18
But it's buried so that the top of the tan is one meter below the ground.
00:24
So you need to consider that.
00:26
So the question is, how much work is done in pumping, a full time of water up to the ground level.
00:34
Okay, now remember that the water weights, yes, the water weights 9 ,800 new tons per cubic meter, okay? we are also given that information from this.
01:03
So, first of all, we are going to press the force for this.
01:07
So that will be pi times the radius square, this times the differential in the height, and this times the weight that we are given for this.
01:18
That is 9 ,800.
01:24
Substituting here the radius, we know that the radius is 2, then that to the square.
01:31
Then this will give us a value of 39 ,000 -200...