Let Us Compare the Angular Momentum of Mars (L_M)in Its $\times$

Multiple Choice

Let us compare the angular momentum of Mars (L_M) in its orbit around the Sun to that of Earth (L_E) .The mean orbital speed of Mars is 24 km/s,whereas that of Earth is 30 km/s.The mean orbital radius of Mars is 228 $\times$ 10⁶ km,whereas that of Earth is 150 $\times$ 10⁶ km.If the mass of Mars is 11% that of Earth,calculate the ratio L_M / L_E.

A) 0.21
B) 0.090
C) 7.7
D) 11
E) 0.13