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      Question

      The speed of a boat in still water is 12 km/hr. It

      covers (upstream) a distance of 75 km in 12 hours. The speed (in km/hr) of the stream is
      A 4.5 km/hr Correct Answer Incorrect Answer
      B 2.2 km/hr Correct Answer Incorrect Answer
      C 2 km/hr Correct Answer Incorrect Answer
      D 2.75 km/hr Correct Answer Incorrect Answer
      E 5.75 km/hr Correct Answer Incorrect Answer

      Solution

      Upstream speed of boat = Distance/Time = 75/12 = 6.25 km/hr Therefore, speed of current = 12 – 6.25 = 5.75 km/hr

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