# How do you solve for r in s = 2 pi rh?

$r = \frac{s}{2 \pi h}$
Write the formula as $2 \pi r h = s$
$\frac{2 \pi r h}{2 \pi h} = \frac{s}{2 \pi h} \text{ divide both sides by 2pi h to isolate r}$
$r = \frac{s}{2 \pi h}$