"I don't know," she said, "go over it again."

The math homework my friend was doing is very easy, for me but not so good for her because she is doing surface area of the cylinder. The formula is simple all it takes is (A=Radius squared times pi times 2)+(circumference times width)

"What is the question?" I asked.

"If a cylinder has a diameter of 36 and a width of 42