Two trains of equal length are running on parallel lines in the same direction at 52 km/h and 40 km/hr. The faster train passes the slower train in 36 seconds. The length of each train is-

Question: Two trains of equal length are running on parallel lines in the same direction at 52 km/h and 40 km/h. The faster train passes the slower train in 36 seconds. The length of each train is-

Solution:
Let,
The length of each train = x metres.
Then, distance covered = 2x metres.
Relative speed = (52 - 40) km/hr
= {12 × (5/18)} m/sec
= 10/3 m/sec

ATQ,
2x/36 = 10/3
⇒ 2x = 120
∴ x = 60 m