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      Question

      The ratio of the speed of the boat in still water to

      the speed of the stream is 9: 1 and the boat can travel 20 km downstream in 24 minutes. Then, how much time will the boat take to cover 50 km upstream?
      A 72 min Correct Answer Incorrect Answer
      B 75 min Correct Answer Incorrect Answer
      C 45 min Correct Answer Incorrect Answer
      D 30 min Correct Answer Incorrect Answer

      Solution

      The correct answer is B

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