A Hollow Sphere and a Solid Sphere Each Made from the Same

Multiple Choice

A hollow sphere and a solid sphere each made from the same material and having equal maximum radius are rolled from rest (without slipping) the same distance down an inclined plane. The travel time of the hollow sphere is

A) smaller than the travel time of the solid sphere.
B) larger than the travel time of the solid sphere.
C) the same as the travel time of the solid sphere.
D) unknown; more information is needed to work out the answer.