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      Question

      The respective ratio between the time taken by a boat to

      travel the same distance downstream in stream A and that in stream B is 7 : 5. The speed of the boat is 10 km/h and the speed of stream A is one third of the speed of stream B. What is the speed of stream B? (in km/h)
      A 2.5 Correct Answer Incorrect Answer
      B 7 Correct Answer Incorrect Answer
      C 4 Correct Answer Incorrect Answer
      D 5 Correct Answer Incorrect Answer
      E 7.5 Correct Answer Incorrect Answer

      Solution

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