# 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.