Multiple Choice Questions on Two trains of equal length running with the speeds of 60 and 40 kmph take 50 seconds to cross each o........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two trains of equal length running with the speeds of 60 and 40 kmph take 50 seconds to cross each o...........

Quantitative Aptitude ( CCS) Problems on trains
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    Two trains of equal length, running with the speeds of 60 and 40 kmph, take 50 seconds to cross each other while they are running in the same direction. What time will they take to cross each other if they are running in opposite directions  ?

    8 sec

    Incorrect Answer

    10 sec

    Correct Answer

    12 sec

    Incorrect Answer

    15 sec

    Incorrect Answer
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    Explanation:

    Relative Speed = 60 -40 = 20 x 5/18 = 100/18

    Time = 50

    Distance = 50 x 100/18 = 2500/9

    Relative Speed = 60 + 40 = 100 x 5/18

    Time = 2500/9 x 18/500 = 10 sec.

    Hence, option 2 is the correct answer.

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