In Another Solar System,a Planet Has an Airless Moon Zygo

Multiple Choice

In another solar system,a planet has an airless moon Zygo that is 4.0 × 10⁵ m in diameter.Experiments reveal that a freely falling object at the surface of Zygo accelerates at 0.20 m/s².What is the mass of Zygo? (G = 6.67 × 10^-11 N ∙ m²/kg²)

A) 2.4 × 10¹⁹ kg
B) 4.8 × 10¹⁹ kg
C) 1.2 × 10²⁰ kg
D) 2.4 × 10²⁰ kg
E) 4.8 × 10²⁰ kg