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Mathematics, 06.12.2019 11:31 salgado100400
Atourist 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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Atourist sailed against the current on a river for 6 km, and then he sailed in a lake for 15 km. in...
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