Mathematics, 27.02.2020 06:28, HyperT1676

A crew team took 40 minutes to row 4 km up the river. It took them 30 minutes to row back the same distance in the direction of the current. Everyone rowed with the same intensity both ways. What is the speed of the current measured in km per hour?

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A crew team took 40 minutes to row 4 km up the river. It took them 30 minutes to row back the same d...