A Spherical Shell and a Solid Sphere (Both of the Same

Multiple Choice

A spherical shell and a solid sphere (both of the same total mass) are rotating about a diameter at the same angular frequency and with the same rotational kinetic energy.What is the ratio of the spherical shell radius to the solid sphere (i.e.,R_{spherical shell}/R_{solid sphere}) ?

A) (2/5) ^1/2
B) (3/10) ^1/2
C) (1/2) ^1/2
D) (3/5) ^1/2
E) (2/3) ^1/2