(Solved): Use Washer/desk method. revolving over the y- axis (30) Let R be the region in the first quadrant ...

(30) Let $R$ be the region in the first quadrant that is bounded by the curves $y=\sqrt{x}$, $x=0$ and $y=2?x$. (c) Find the volume of the solid generated when the region $R$ is revolved about the $y$-axis. Your solution must include a graph that shows a typical slice of the region for the method you use, and the result of revolving this slice about the axis of rotation.