Mathematics, 30.10.2020 09:00 jesusdelao

A boat can travel at a speed of 12km/h in still water. If it takes three hours to go 15 km upstream and back, find the speed of the current, giving your answer to 2 decimal places. What is the rate of the boat?
How long does it take for the boat to go back and forth the stream?

Let x be the speed of the current.

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