1.

A boat having a length of 3 m and breadth of 2 m is floating on a lake. The boat sinks by 1 cm when a man gets on it. The mass of the mas is:A. 60 KgB. 72 kgC. 12 kgD. 128 kg

Answer» Correct Answer - A
Volume of water displaced, `V=(3m)xx(2m)xx((1)/(100)m)=(6)/(100)m^3`
Mass of man `=`mass of water displaced, `m=Vrho=((6)/(100)m^3)(1000(kg)/(m^3))=60kg`


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