Mass of moon is 7.34 ×1022 kg. If the acceleration due to gravity on the moon is 1.4 m/s2 , the radius of the moon is (G = 6.667×10-11 Nm2 /kg2)
(a) 0.56 × 104 (b) 1.87 × 106
(c) 1.92 × 106 (d) 1.01 × 108
Answer: b
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