If you have a pizza with radius z and thickness a, it's volume is pizza (or pi*z*z*a)Â @qikipedia
Tokyoflash Treasure Hunt - Win a Tokyoflash Watch of Your Choice!
Going on right now: Tokyoflash Treasure Hunt #26. Win a Tokyoflash watch and neat stuff from the NeatoShop. It's fun and easy to play: Link