In an effort to not waste wrapping paper at Christmas, John would like to wrap presents with the exact
amount of paper needed for each present (with no excess). One present will go in a cylindrical container John will construct himself. The volume of this cylinder is 432π in^3. (The volume of a cylinder is
V = πr²h and the surface area is S= 2πr^2 +2πrh). What should the radius and height of the cylinder be for John to minimize the amount of wrapping paper needed to cover the container?
