A boat floating in a water tank is carrying a number of large stones. If the stones are unloaded into water, what will happen to the water level?

Options

A. fall
B. rise
C. remains same
D. cannot be determined

Answer

A

Explanation

When stones were floating with boat,they will be displacing water of volume (say `V_(1)`) whose weight should be equal to weight of stones. When the stone sink, they will displace water of volume (say `V_(2))` whose volume is equal to the volume of stones. But since density of water is less than the density of stones
`:. V_(1)gtV_(2)` or level will fall.