FRUSTRAted ;)
Source:
November 27, 2005
geometry3D geometryfrustumrationumber theoryrelatively prime
Problem Statement
A solid in the shape of a right circular cone is 4 inches tall and its base has a 3-inch radius. The entire surface of the cone, including its base, is painted. A plane parallel to the base of the cone divides the cone into two solids, a smaller cone-shaped solid and a frustum-shaped solid , in such a way that the ratio between the areas of the painted surfaces of and and the ratio between the volumes of and are both equal to . Given that , where and are relatively prime positive integers, find .