A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1.2 cm when a man gets on it. The mass of man is Choose the correct option.
A) 72 kg  B) 60 kg  C) 72 kg  D) 96 kg  E) None
Solution   Volume of water displaced	= (3 x 2 x 0.012)m3   = 0.072 m3.   Mass of man	=Volume of water displaced ×Density of water   = (0.072×1000) kg   = 72 kg.   72 kgnswer 72 kg
<result>A</result>
A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1.2 cm when a man gets on it. The mass of man is