You are given a formula with variables V, h, and r.
You are given values for V and h.
You are asked for the corresponding value of r.
Plug the number for V in for V in the formula..
Plug the number for h in for h in the formula.
Simplify as much as you can.
Solve the resulting quadratic equation for the value of r.
If you get stuck or do not understand a step, please reply showing your progress and clearly stating where you are getting confused. Thank you!