A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 2 cm when a man gets on it. The mass of man is	Select
A) 12 kg
B) 60 kg
C) 72 kg
D) 120 kg
E) None
Solution   Volume of water displaced	= (3 x 2 x 0.02)m3   = 0.12m3.   Mass of man	=Volume of water displaced ×Density of water   = (0.12×1000) kg   = 120 kg.   Answer 120 kg
<result>D</result>
A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 2 cm when a man gets on it. The mass of man is