The weight of an object is the same on two different planets. The mass of planet A is only thirty-five percent that of planet B. Find the ratio rA/rB of the radii of the planets.

Answer 1

G .35 Mb m/Ra^2 = G Mb m / Rb^2

.35 Mb/Mb = Ra^2/Rb^2

Ra/Rb = sqrt(.35)

Answer 2

25