Multiple Choice Questions on Two trains are running in opposite directions in the same speed The length of each train is 120 mete........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two trains are running in opposite directions in the same speed The length of each train is 120 mete...........

Quantitative Aptitude ( CCS) Problems on trains
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    Two trains are running in opposite directions in the same speed. The length of each train is 120 meter. If they cross each other in 12 seconds, the speed of each train (in km/hr) is

    30 Km/hr

    Incorrect Answer

    36 Km/hr

    Correct Answer

    80 Km/hr

    Incorrect Answer

    90 Km/hr

    Incorrect Answer
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    Explanation:

    Distance covered = 120+120 = 240 m
    Time = 12 s

    Let the speed of each train = x.
    Then relative velocity = x+x = 2x

    2x = distance/time = 240/12 = 20 m/s

    Speed of each train = x = 20/2 = 10 m/s

    = 10*18/5 km/hr = 36 km/hr

    Hence, option 2 is the correct answer.

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