Set Up an Equation and Solve the Problem $\pi$ Square Centimeters

Multiple Choice

Set up an equation and solve the problem. The total surface area of a right circular cylinder is 36 $\pi$ square centimeters. If a radius of the base and the altitude of the cylinder are the same length, find the length of a radius.

A) 4 centimeters
B) 9 centimeters
C) 3 centimeters
D) 2 centimeters
E) none of these