Question
A boat goes 6km an hour in still water, it takes thrice
as much time to go the same distance against the current in comparison to the direction of the current. The speed of the current is (km/h)Solution
Let the speed of the boat in still water =B and speed of the stream =S B=6/1=6km/h B+S B-S 1    3 (B+S) ×1=(B-S) ×3 B+S=3B-3S 2B=4S S= (2×6)/4=3km/h
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