Question
A boat can travel 36 km upstream and 54 km downstream in
9 hours. If the speed of the boat in still water is 3 times the speed of the stream, find the speed of the stream.Solution
ATQ, Speed Stream = x, Boat = 3x. U = 2x, D = 4x. 36/2x + 54/4x = 9 => 31.5/x = 9 => x = 3.5.
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