Multiple choice general knowledge math & puzzles

Near the beach there is a floating ship. Over the board is hauled down a rope ladder with 10 steps. The distance between every two steps is 30cm. The lowest step lays on the water surface. The tide is coming and every hour the water rises with 15cm. When will the water get to the third step of the ladder?

  1. after 2 hours

  2. after 4 hours

  3. Never

  4. after 14 hours
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ship floats on water, so it rises with the tide. As the water level rises, the ship and the ladder attached to it rise together. Therefore, the distance between the water surface and any step of the ladder remains constant regardless of the water level.

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