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      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.
      A 9 km/hr Correct Answer Incorrect Answer
      B 8 km/hr Correct Answer Incorrect Answer
      C 16 km/hr Correct Answer Incorrect Answer
      D 4 km/hr Correct Answer Incorrect Answer

      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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