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    Question

    A train is travelling at the rate of 72 km/hr. How many

    seconds it will take to cover a distance of 3/5 km?
    A 40 sec Correct Answer Incorrect Answer
    B 30 sec Correct Answer Incorrect Answer
    C 25 sec Correct Answer Incorrect Answer
    D 20 sec Correct Answer Incorrect Answer

    Solution

    Speed of train = 72 km/hr Speed of train in (m/sec) = 72 x 5/18 = 20 m/sec Distance = 3/5 of 1 km = 3/5 x 1000 m = 600 m Therefore, Speed = distance/time 20 = 600/t Time = 600/20 = 30 sec

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