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SSC Sample Paper Mock Test-11 SSC CGL Tear-II Paper-1

  • question_answer
    Two trains 105 m and 90 m long, run at the speeds of 45 km/h and 72 km/h respectively, in opposite directions on parallel tracks. The time which they take to cross each other is

    A) 8 s       

    B)  6 s  

    C)  7 s

    D)  5 s

    Correct Answer: B

    Solution :

      Length of both trains \[=105+90=195\text{ m}\] Relative speed \[=(45+72)=117\text{ km/h}\] \[=117\times \frac{5}{18}=\frac{65}{2}\text{m/s}\] \[\therefore \] Time taken\[=\frac{195}{\frac{65}{2}}=\frac{195\times 2}{65}=6\,\,\text{s}\]


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