Here is a link to a page that has equations for surface area and volume of many geometric shapes.
http://staff.argyll.epsb.ca/jreed/math8/strand3/3206.htm
This link is to an interactive surface area and volume page:
http://www.shodor.org/interactivate/activities/SurfaceAreaAndVolume/
If you have some numbers I can work with, I could show you better. Step by Step.
Good Luck - Ivy