# The Volume of the Solid by Rotating the Region around y-axis

Please explain in detail as much possible:

Find the volume of a triangle with sides y = 2, y = x+1, y = 11-x. The vertices are (5, 6), (1, 2) and (9, 2). Find the volume by rotating about y-axis:

(i) Method of disks

(ii) Cylindrical shell method

https://brainmass.com/math/integrals/volume-solid-rotating-region-around-y-axis-375745

#### Solution Summary

The solution applies two different methods to calculate the volume of solid of revolution formed when R is revolved about the y-axis.

$2.19