A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1cm when a man gets on it. The mass of the man is: Choose the correct choice:	A) 12 kg	B) 60 kg	C) 72 kg	D) 96 kg	E) None of these
Explanation:   Volume of water displaced = (3 x 2 x 0.01) m3   = 0.06 m3.   ∴ Mass of man = Volume of Water displaced x Density of water   = (0.06 x 1000)kg   = 60 kg.   Answer: 60 kg
<result>B</result>
A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1cm when a man gets on it. The mass of the man is: