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.
r^2*v=300,r*(r+sqrt(r^2+v^2))=90
r^2*v=300,r*(r+sqrt(r^2+v^2))=90
Natural Language
Math Input
Extended Keyboard
