Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
33.1*10.5*2*pi + pi*10.5^2 + 4*pi*10.5^2/2
33.1*10.5*2*pi + pi*10.5^2 + 4*pi*10.5^2/2
Natural Language
Math Input
Extended Keyboard
