Planets a and B Are Uniform Solid Spheres That Rotate $\omega$

Multiple Choice

Planets A and B are uniform solid spheres that rotate at a constant speed about axes through their centers. Although B has twice the mass and three times the radius of A, each planet has the same rotational kinetic energy. What is the ratio $\omega$ _B/ $\omega$ _A of their angular speeds?

A) 0.055
B) 0.093
C) 0.165
D) 0.191
E) 0.236