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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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