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A rope ladder hangs over a ship's side with its bottom rung touching the water. Rungs are 20 cm apart. If the tide rises by 60 cm, how many rungs are under water?
Hard
A rope ladder hangs over a ship's side with its bottom rung touching the water. Rungs are 20 cm apart. If the tide rises by 60 cm, how many rungs are under water?
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