Physics question below?

Question

A space traveler weighs 565 N on earth. What will the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth?

Answer 1

The gravity of a planet acts as if the entire mass were concentrated at the center (as long as we are on the outside of the planet). Gravity increases proportional to mass, and inversely proportionat to radius squared.

Answer 2

2/9 of 565 = 126N (125.55555555.....)