A boat having a length 4 m and breadth 3 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 from the following choices:
A) 12 kg B) 120 kg C) 72 kg D) 96 kg E) None of these
Explanation:   Volume of water displaced = (4 x 3 x 0.01) m3   = 0.12 m3.   ∴ Mass of man = Volume of Water displaced x Density of water   = (0.12 x 1000)kg   = 120 kg.   Answer: 120 kg
<result>B</result>
A boat having a length 4 m and breadth 3 m is floating on a lake. The boat sinks by 1cm when a man gets on it. The mass of the man is: