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A boat can travel 12 km down the river in the same time it can go 4 km up the river. If the current in the river is 2 km per hour, how fast can the boat travel in still water?

 Feb 2, 2020
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12/(s+2) =4/(s - 2), solve for s

 

s = 4 km/h - boat's speed in still water.

 Feb 2, 2020
edited by Guest  Feb 2, 2020

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