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PD0019 · Problem 80

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Problem

A map is drawn to a scale of 1 centimeter to kk meters. A lake on the map covers AA square centimeters. In the winter, the lake freezes at a constant rate of rr square kilometers per day. In terms of AA, kk, and rr, how many hours will it take for the entire lake to freeze? (10001000 meters = 11 kilometer)
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