I am having trouble with this one.

A right circular cylinder is inscribed within a right circular cone with height 10in and radius of base 3 inches. Find:

A) The total surface area of the cylinder in terms of the radius of the cylinder.

Now I know the the equation of the surface area of cylinder is; $\displaystyle A=2\pi r^2+ 2\pi r h$

but I don't know how to make it in terms of the radius?