Solution: Let there be two planets X and Y with masses M X and MY . The radius of planet X is twice that of planet Y. If an object weighs 4 times as much on the surface of planet X as it does on the surface of planet Y, then MX/MY is given byA. 1/8 B. 16 C. 1/4 D. 8 E. 1 F. 1/16 G. 1/2 H. 2 I. 4

Let there be two planets X and Y with masses M _{X} and M_{Y} . The radius of planet X is twice that of planet Y. If an object weighs 4 times as much on the surface of planet X as it does on the surface of planet Y, then M_{X}/M_{Y} is given by

A. 1/8

B. 16

C. 1/4

D. 8

E. 1

F. 1/16

G. 1/2

H. 2

I. 4