Temple University: Gerardo Mendoza and Dan Reich's "Calculus on the Web"

Click on the "Index" for Book II. Scroll down to "2. Applications of Integration," and click button 119 (Solid of Revolution - Washers). Work on problems 1-12. If at any time a problem set seems too easy for you, feel free to move on.

Click http://cow.math.temple.edu/ link to open resource.