# What will be the Length of Equal Train? If

Two trains of equal length are running on parallel line in the same direction at the rate of 46 km/hr and 36 km/hr. The faster train passes the slower train in 36 seconds. The length of equal train is

- 50 m
- 72 m
- 80 m
- 82 m

**Answer: (1) 50 m**

**Explanation:-**

Let be the length of each train = X miters

Then, the total distance covered = 2X miters

Relative speed = 46 – 36 = 10 km/hr.

Relative speed in m/sec = 10 x 5/18 m/sec.

= 25/9 m/sec

Therefore, 2X/36 = 25/9

2X = 25 x 36 /9

2X = 100

X = 50 m

Hence, the answer is (1) 50 m.