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      Question

      The running speed of a train is 100 km/hr. When

      stoppages are considered, its average speed becomes 80 km/hr. Calculate the time the train halts every hour.
      A 12 mins Correct Answer Incorrect Answer
      B 18 mins Correct Answer Incorrect Answer
      C 24 mins Correct Answer Incorrect Answer
      D 30 mins Correct Answer Incorrect Answer

      Solution

      Time of stoppages per hour = (100 – 80)/100 × 60 = 12 minutes
      Therefore, the train halts for  12 minutes  per hour.

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