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      Question

      A boy can swim in water with a speed of 15 km/hr in

      still water. If the speed of the stream is 5 km/hr, what will be the time taken by the boy to cover 60 km downstream?
      A 2 hrs Correct Answer Incorrect Answer
      B 3 hrs Correct Answer Incorrect Answer
      C 5 hrs Correct Answer Incorrect Answer
      D 6 hrs Correct Answer Incorrect Answer

      Solution

      Downstream Speed = (15 + 5) km/hr = 20 km/hr Time taken = 60/20 = 3 hours

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