How do you make r the subject for the equation v equals pi over 3 multiplied by r squared h

$$$$v = \frac{\pi}{3}r^2h$$\\\\
Multiply both sides by $\frac{3}{\pi h}$ to get $$v\frac{3}{\pi h}=r^2$$\\\\
Take the square root of both sides
$$ r=\sqrt{v\frac{3}{\pi h}}$$

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