Question 20184
Hello There:

S = 2*(3.14)*r*h

The first thing we can do is simplify the expression on the right side of the equals sign because 2*(3.14) = 6.28

S = 6.28*r*h

To solve for h, we need to get rid of the 6.28*r on the right side because this will isolate h by itself (which is the goal of solving for a variable).

Divide both sides by 6.28*r.

S/(6.28*r) = (6.28*r)*h/(6.28*r)

h = S/(6.28*r)

~ Mark