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2022-01-12 ¿ÀÀü 1:56:56 | Á¶È¸ : 2322
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[q] :
a rope ladder is hanging over the side of a ship.
.
the ladder is 12 feet long, and the rungs are one foot apart.
the lowest rung is resting on the top of the ocean.
the tide rises at the rate of four inches per hour.
.
how long will it take
before the first four rungs of the ladder are under water?
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