An Astronaut Is in Equilibrium When He Is Positioned 140

Multiple Choice

An astronaut is in equilibrium when he is positioned 140 km from the center of asteroid X and 581 km from the center of asteroid Y, along the straight line joining the centers of the asteroids. What is the ratio of the masses X/Y of the asteroids?

A) 0.0581
B) 17.2
C) 0.241
D) 4.15