00:01
Let us consider that water is pouring into a conical tank at a rate of 10 feet cube per minute.
00:12
Therefore, we will consider this to be the rate of change of volume with respect to time.
00:19
Now, the tank is 10 feet tall, that is the height of the tank is 10 feet and the radius is 4 feet.
00:29
Now we need to find how fast is the water level rising when it is 5 feet high.
00:37
That is when h is equal to 5 feet, we need to find d .h by dt.
00:49
Let us consider a conical tank which is in the shape of a cone.
01:00
So here we will have the height to be 10 feet and the radius is.
01:07
4 feet.
01:11
So the volume of a cone is 1 by 3 by r square h.
01:30
Now from the figure we can say that radius r by h ratio is 4 by 10.
01:42
On canceling we get 2 by 5.
01:45
Therefore we can say that r is equal to 2 by 5...