Multiple choice

A toyboat is floating in a tub full of water. It develops a small hole and sinks to the bottom. What will happen to the level of water in the tub?

  1. Increase

  2. Decrease

  3. Remain unchanged

  4. First increases and then decreases

  5. Cannot be determined
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When the boat was floating in water, it was displacing a volume of water, the mass of which was equal to that of the boat. When the boat sinks, it displaces a volume of water the mass of which must be lesser than that of the boat. Hence, the 2nd volume of water displaced must be less than the 1st. So, the water level would come down.

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