Question

Two trains of equal length are running on parallel lines in the same direction at 46 km/h and 36 km/h. The faster train passes the slower train in 36 s. The length of each train is

Options

• 50 m 

• 72 m 

• 80 m 

• 82 m

Answer 1

50 m 
Explanation:
Let the length of each train be x m.
Then, distance covered = 2x m
Relative speed = (46 - 36) km/h

= `(10xx5/18) "m/s" = (25/9) "m/s" `

⇒ `(2x)/36=25/9`

⇒ 2x = 100

∴ x = 50 m