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    Question

    Two trains are running in the opposite direction with

    the same speed. If the length of each train is 120 meters and they cross each other in 12 seconds, then what is the speed of each train in km/hr hour?
    A 35 km/hr Correct Answer Incorrect Answer
    B 34 km/hr Correct Answer Incorrect Answer
    C 32 km/hr Correct Answer Incorrect Answer
    D 36 km/hr Correct Answer Incorrect Answer

    Solution

    Each train is 120 m long, so the total distance covered when they cross each other = 120 + 120 = 240 m.
    Time taken = 12 seconds.
    Relative speed = 240 ├╖ 12 = 20 m/s.
    Since both trains have the same speed, speed of each train = 20 ├╖ 2 = 10 m/s.
    Converting into km/hr: 10 ├Ч 3.6 = 36 km/hr.

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