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A body has a weight 90 kg on the earth’s surface, the mass of the moon is 1/9 that of the earth’s mass and its radius is 1/2 that of the earth’s radius. On the moon the weight of the body is

(a)      45 kg                               (b)  202.5 kg

(c)   90 kg                                  (d)  40 kg

Answer:  d

(4)

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