Question

A boat having a length 3m and breadth 2m is floating on a lake.The boat sinks by1cm when a man gets into it. The mass of the man is?

Answer 1

L=3m

B= 2m

h=1cm= .01m

Vol of water displaced= 3 × 2×.01

vol of water displaced = 0.06m^3

mass = vol × density

density of water= 1000 kg/m^3

mass of man = 0.06 × 1000

mass of man = 60 kg