ratio of the mass of Earth to the mass of the Moon

NDA NA Exam I 2015 Questions
Question 120 The radius of the Moon is about one-fourth that of the Earth and acceleration due to gravity on the Moon is about one-sixth that on the Earth. From this, we can conclude that the ratio of the mass of Earth to the mass of the Moon is about
A) 10
B) 100
C) 1000
D) 10000
Answer:  100

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