A paddle boat can move at a speed of 14 km/h in still water. The boat is paddled 4 km downstream in a river in the same time it takes to go 2 km upstream. What is the speed of the river?

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asked Mar 5, 2018 133k views

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A paddle boat can move at a speed of 14 km/h in still water. The boat is paddled 4 km downstream in a river in the same time it takes to go 2 km upstream. What is the speed of the river?

Mathematics
middle-school

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1.20/(14+x) =10/(14-x) 2.20(14-x)=10/(14+x) 3.280-20x=140+10x 4.140=30x 5.x=14/3

Adam Jones answered Mar 12, 2018

by Adam Jones

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