3. 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 the man is:
A.72 kg
B.96 kg
C.60 kg
D. 12 kg
3. 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 the man is:
A.72 kg
B.96 kg
C.60 kg
D. 12 kg