The acceleration due to gravity on moon is only one sixth that on earth. Ratio of moon radius `(R_m)` to earth.s radius `(R_e)` should be:
(a)`6/1` if both are assumed to have same density
(b)`1/6` if both are assumed to have same density
(c)`5/18` if `rho_e/rho_m` is given as 5/3
(d)`9/5` if `rho_m/rho_e` is given as 3/5

Options

A. only a & b are true
B. only b & c are true
C. only a, b & d are true
D. all are true

Answer

B