Mathematics, 21.07.2019 08:00 dylancasebere

Amotorboat covers the distance from one pier to the other pier in 4 hours and the way back in 5 hours. what is the speed of the boat in still water, if it covers 70 km with the current in 3.5 hours? (its not 20 i tried)

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Amotorboat covers the distance from one pier to the other pier in 4 hours and the way back in 5 hour...