PinkMonkey999 PinkMonkey999

16-05-2017
Mathematics

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A tourist sailed against the current on a river for 6 km, and then he sailed in a lake for 15 km. In the lake he sailed for 1 hour longer than he sailed in the river. Knowing that the current of the river is 2 km/hour, find the speed of the boat while it is traveling in the lake.

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bluemonkey999 bluemonkey999

17-05-2017

6 km/hour and/or 5 km/hour

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