00:01
Let's find the volume of the solid obtained by rotating the bounded region by the curves.
00:06
So, y equals 4x4, y equals 4x, and then x greater than 0.
00:12
This is in the first quadrant.
00:13
We rotate the region about the x -axis.
00:16
So here i have drawn the sketch of the curves as well as the boundary region.
00:21
This basically is the boundary region between the curve and the line.
00:25
And we have to find the volume when it is rotated about the x -axis.
00:30
So here i have shown the spinner that it is rotated about the x -axis.
00:35
And in this case, we use this formula.
00:37
Volume of solid is given by pi times of the different integral from x equals a to x equal to b.
00:44
And then r of x quantity square minus the small r of x quantity square.
00:49
Well, this r of x is the top radius bounded by the line y equals 4x.
00:54
And the small r of x is the bottom radius bounded by the curve y equals.
01:00
4x power 4.
01:01
So here we have the big r of x equals 4x and then the small r of x this equals 4x 4...