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When the tide is at it's highest, how many rungs are under water?

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A boat has a ladder that has six rungs, each rung is one foot apart. The bottom rung is one foot from the water. The tide rises at 12 inches every 15 minutes. High tide peaks in one hour.
When the tide is at it's highest, how many rungs are under water?

posted Dec 15, 2015 by Prachi Sharma

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