a boat takes thrice as much time to cover 40 km up the stream as on going 40 km down the stream . if the speed of the boat is 6 km find the speed
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The speed of water is 3 km per hour
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Always try equating it in terms of time taken
The speed of boat will always be greater than speed of stream. Only then the boat can go upstream. Therefore it is speed upstream is (6-x) and not (x-6)
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