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.
d^2/dr^2(pi*r^2 + pi*r*sqrt(r^2 + ((3*V)/(pi*r^2))^2)))
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random