A small plastic boat loaded with pieces of steel rods is floating in a bath tub. If the cargo is dumped into the water, allowing the boat to float empty, the water level in the tub will
- A. Rise
- B. Fall
- C. Remains the same
- D. Rise and then fall
Answer: B. Fall
Explanation: When steel is in the boat, it displaces water equal to its weight. When dumped, it displaces water equal to its volume. Since density of steel > density of water, volume displaced is less when submerged. Hence water level falls.