Two trains of lengths 310 m and 330 m respectively are 160 m apart. They start moving towards each other on parallel tracks, at speeds 130 km/h and 158 km/h, respectively. In how much time (in seconds) will the trains cross each other?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 10.
Lengths of the 2 trains = 310 m and 330 m
Distance between them = 160 m
Total distance = 310 + 330 + 160 = 800 m
Speeds of the 2 trains = 130 km/h and 158 km/h
Relative speed = 130 + 158 = 288 km/h
Relative speed in m/s = 288 × = 80 m/s
Time = Total distance/speed = 800/80 = 10 sec