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SSC Sample Paper Mock Test-20 SSC CGL Tear-II Paper-1

  • question_answer
    Two trains 140m and 160 m long run at the speeds of 60 km/h and 40 km/h respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is

    A) 10

    B)  10.8

    C)  9

    D)  9.6

    Correct Answer: B

    Solution :

    Total length of trains\[=140+160=300\,\,\text{m}\] Relative speed \[=60+40=100\,\,\text{km/h}\]\[=100\times \frac{5}{18}\text{m/s}=\frac{250}{9}\text{m/s}\] \[\therefore \]Time taken to cross each other \[=\frac{300}{\frac{250}{9}}=\frac{300\times 9}{250}=10.8\,\,\text{s}\]


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