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Mathematics, 02.03.2020 23:24 tacaurus

It took a crew 1 h 40 min to row 8 km upstream and back again. If the rate of flow of the stream was 9 km/h, what was the rowing speed of the crew in still water?

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It took a crew 1 h 40 min to row 8 km upstream and back again. If the rate of flow of the stream was...
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