Find the volume of the solid obtained by rotating the region-2

[phillyolly]

Homework Statement

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. Sketch the region, the solid, and a typical disk or washer. About x axis.

y=sqrt(25-x²)
y=0
x=2
x=4

Homework Equations

The Attempt at a Solution

I drew a graph, region and solid. Please help me out with the disk.
Jump start for any solution, please?

 

[jegues]

I posted this in your other thread, here's the link: https://www.physicsforums.com/showthread.php?t=418382"

This figure should give you some intuition on visualizing the disks.

I don't really understand where your confusion lies, so if there is any please specify where and why.