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    Question

    Two trains are moving in opposite directions at speeds

    of 72 km/hr and 54 km/hr. If they cross each other in 15 seconds, find the length of the faster train if the slower train is 150 meters long.
    A 320 m Correct Answer Incorrect Answer
    B 330 m Correct Answer Incorrect Answer
    C 375 m Correct Answer Incorrect Answer
    D 350 m Correct Answer Incorrect Answer

    Solution

    Relative speed = (72 + 54) km/hr = 126 km/hr = 126 × (1000/3600) m/s = 35 m/s. Total distance = relative speed × time = 35 × 15 = 525 meters. Length of the faster train = 525 - 150 = 375 meters. Answer: c) 375 m

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