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Mathematics, 25.05.2021 04:00 shukriabdisabrie

A boat can travel 10 miles/hr in still water. It travels 20 miles upstream then returns to starting location. Total time of trip is 7 hours. What is the speed of the current?

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A boat can travel 10 miles/hr in still water. It travels 20 miles upstream then returns to starting...
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