Question

A boat having length $2m$ and width $1m$ is floating in a lake. When a man stands on the boat, it is depressed by $3cm$. The mass of the man is:

• A. $50kg$
• B. $55kg$
• C. $60kg$
• D. $70kg$

Answer 1

The correct option is C $60kg$

The mass of the man should he equal to the mass of the water displaced when the man stansd on the boat.
Mass of man $=2\times 1\times \frac{3}{100}\times 1000kg$
$=60kgs$