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.
(1/4*3*0.006^2+1/12*3*1.5^2)/(1/2*3*0.006^2)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random