Which of the following equations is equivalent to s=πr^2h

So I think you're trying to solve for h, and your original equation is

s=πr^2h.

To get to you answer, divide both sides of the equation by πr^2.

Your answer should be:

h = s / πr^2 (or in this case, b)

This is the equation for the volume of a cyclinder, where the area of the circle on the top or bottom is multiplied by the height of the side