Two trains having lengths of 150 m and 350 m are running at speeds of 60 km/h and 120 km/h, respectively, in the same direction. The time taken (in minutes) by the faster train, coming from behind, to completely cross the other train is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 0.5.
Length of trains = 150 m and 350 m
Speeds = 60 km/h and 120 km/h (same direction)
Relative speed = 120 - 60 = 60 km/h = (60 × 5/18) = 16.67 m/s
Total length = 150 + 350 = 500 m
Time = Distance / Speed = 500 / 16.67 = 30 seconds = 0.5 minutes