A rectangular boat floating in water has length 4 m and breadth 1.5 m. A person gets into the boat as a result of which the boat sinks by 2 cm. Mass of the person is :
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a
80 kg
b
100 kg
c
120 kg
d
92 kg
answer is C.
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Detailed Solution
Weight of man =weight of additional displaced water =Vinρwg Mg=(4×1.5×2×10-2)×103×g ⇒M = 120 kg