An object of mass 25 kg has a weight of 41 N on the surface of the moon. The radius of the moon is r. What is the gravitational field strength in N/kg, at a point distance 2r from the center of the moon?
a) 0.205 N/kg
b) 0.294 N/kg
c) 0.612 N/kg
d) 0.882 N/kg