Problems on Trains Questions Answers

Problems on Trains Questions Answers (MCQ) listings with explanations includes questions on trains moving in same directions, trains moving in opposite directions, length of trains, speed of trains and other tricky questions which are important for many competitive exams.

21) Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time which they take to cross each other,

  • 1) 9.8 seconds
  • 2) 10.8 seconds
  • 3) 11.8 seconds
  • 4) 12.8 seconds
View Answer View Explanation
Ans.   B
Explanation :
Relative Speed = 60+40 = 100 kmph = 100*(5/18) = 250/9 m/sec Distance = 140+160 = 300 meters Time = Distance/Speed \begin{aligned} 300*\frac{9}{250} = \frac{54}{5} \= 10.8 \text{ seconds} \end{aligned} So the time trains will take to cross each other will be 10.8 seconds
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