Multiple Choice Questions on Two trains 100 m and 120 m long are running in the same direction with speeds of 72 km hours and 54 ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two trains 100 m and 120 m long are running in the same direction with speeds of 72 km hours and 54 ...........

Quantitative Aptitude ( CCS) Problems on trains
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    Two trains 100 m and 120 m long are running in the same direction with speeds of 72 km/hours and 54 km/hours. In how much time will the first train cross the second one?

    40 second

    Incorrect Answer

    44 second

    Correct Answer

    46 second

    Incorrect Answer

    50 second

    Incorrect Answer
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    Explanation:

    |——————————-|120m (54 kmph)

    ………………………………|———————-|100m (72 kmph)

    So the total distance the faster train needs to travel to cross the slower train is 220m

    ………………………|——————————-|120m (54 kmph)

    |———————-|100m (72 kmph)

    And the relative speed is S1 - S2 = 72–54 = 18 kmph or in mps 18*5/18 = 5 ms/s

    So time taken to travel the distance = distance/speed = 220/5 = 44 seconds

    By: Amit Kumar
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