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    Question

    Train 'C' of length 300 meters passes a pole in 10

    seconds. Train 'D', traveling at triple the speed of train 'C', crosses a bridge in 12 seconds from the opposite direction. If the length of the bridge is 400 meters, find the length of train 'D'.
    A 1260 m Correct Answer Incorrect Answer
    B 1165 m Correct Answer Incorrect Answer
    C 1225 m Correct Answer Incorrect Answer
    D 1040 m Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    ATQ, Speed of train 'C' = 300/10 = 30 m/s Speed of train 'D' = 3├Ч30 = 90 m/s Relative speed = 30+90 = 120 m/s Total distance covered by train 'D' in 12 seconds = 120├Ч12 = 1440 meters Length of train 'D' = 1440тИТ400 = 1040 meters So, the length of train 'D' is 1040 meters.

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