Problems on Trains - Quantitative Aptitude (MCQ) questions for Q. 21527

Q.  Two trains of lengths 156.62 and 100 meters are running on parallel lines with respective speeds of 30 km/hr and 36 km/hr. The time of crossing each other, if they run in the opposite direction is __________ .
- Published on 05 May 16

a. 10 sec
b. 62 sec
c. 14 sec
d. 12 sec
e. None of these

ANSWER: 14 sec
 
Total distance to be covered = 156.62 + 100 = 256.62 m
Trains are running in opposite directions, hence
Relative speed = 30 + 36 = 66 km/hr = 18.33 m/sec
Time = Distance / Relative Speed
= 256.62 /18.33 sec
= 14 sec
Therefore, the time of crossing each other in the opposite direction is 14 seconds.

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