Question
Sita can row 8 km/hr in still water. If it takes her
three times as long to row up a river as it does to row down the same distance, find the speed of the stream.Solution
Let the speed of the boat in still water =B =8km/h Speed of stream =S=x speed of the boat in downstream =B+S=8+x speed of the boat upstream =B-S=8-x B+S             B-S Time            1                 3 ATQ- (8+x) ×1 =(8-x) ×3 8+x =24-3x 4x =16 X =4km/h
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