Need help, can someone explain cylindrical shell method for volume?

[timm3r]

im stuck and my book doesn't explain much on how to get the volume of a shape by the cylindrical shell method. What i really need is to show how to get the general formula of a volume of a sphere and a cone using cylindrical shells.

 

[robierob]

http://pages.pomona.edu/~sg064747/teaching/F06-31/Lecture/F06-31-Lecture08.pdf

 

[timm3r]

wow thanks for the quick response,

 

[Ayesh]

I would also like to have it explain to me but the website given is out of order.