A boat having a length of 3 metres and breadth 2 metres in floating on a lake. The boat sinks by one cm when a man gets on it. The mass of the man is

60 kg

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62 kg

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72 kg

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128 kg

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Solution

The correct option is A 60 kg
Weight of a man = wt. of water displaced
= volume x density = 3 x 2 x $\frac{1}{100} x 10^{3}$ = 60 kg

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