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    Question

    A train crosses a signal post in 36 seconds and a tunnel

    of length 360 metres in 66 seconds. What is the trainтАЩs speed in km/h?
    A 43.2 km/h Correct Answer Incorrect Answer
    B 33.2 km/h Correct Answer Incorrect Answer
    C 63.2 km/h Correct Answer Incorrect Answer
    D 37.5 km/h Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the speed of train be 'v' m/s Length of train = 36v metres So, (36v + 360) ├╖ 66 = v тЗТ 36v + 360 = 66v тЗТ 30v = 360 тЗТ v = 12 Speed of train = 12 m/s = 12 ├Ч (18/5) = 43.2 km/h

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