A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1 cm when a man gets on it. The mass of man is :  Choose the correct choice from the following options
A) 12 kg	B) 60 kg	C) 72 kg	D) 96 kg	E) None of these
Solution   Volume of water displaced = (3 × 2 × 0.01) m3 = 0.06 m3.   ∴ Mass of man = Volume of water displaced × Density of water   = (0.06 × 100)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 1 cm when a man gets on it. The mass of man is :