The Water Level

You are in a boat in a swimming pool holding a large rock. You throw the rock into the pool. Does the water level rise, fall, or stay the same?

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Quick Answer & Explanation

The water level falls

The answer to this riddle is The water level falls. Difficulty: Hard · Solved by 15,631 puzzle lovers.

The water level falls. When the rock was in the boat, it displaced water equal to its weight. In the water, it displaces only its volume (which is less since rock is denser than water).

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