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Railways R.R.C. (Patna) Solved Paper Held on 1st Shift 16-11-2014

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

    A) 5 sec                            

    B) 6 sec

    C) 7 sec                            

    D) 8 sec

    Correct Answer: B

    Solution :

    Required Time \[=\frac{105+90}{(45+72)\times \frac{5}{18}}\]                              \[=\frac{195\times 18}{117\times 5}\]                               \[=6\,\,\text{seconds}\]


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