Numerical answer
Two trains, 150 m and 120 m long, are running in opposite directions on parallel tracks at 54 km/h and 36 km/h respectively. Find the time (in seconds) they take to cross each other completely.
Show answer and solution
Answer: 10.8
Since the trains move in opposite directions, relative speed = 54 + 36 = 90 km/h = 90 × 5/18 = 25 m/s. Total distance to be covered while crossing = sum of lengths = 150 + 120 = 270 m. Time = 270/25 = 10.8 seconds.
Saved on this device. Sign in or create a free account to keep it on every device.