Question

Two trains travel in the same direction at the speed of 100 km/h and 46km/h.The faster train passes the man in slower train in 20 sec. find the length of faster train?
1. 200 m
2. 300 m
3. 250 m
4. 350 m
5. 240 m

Answer 1

Correct Answer - Option 2 : 300 m

Given:

Speed of slower train = 100 km/h

Speed of faster train = 46 km/h

The faster train passes the man in slower train in 20 sec.

Formula used:

Relative speed = S₁ – S₂

Speed = Distance/Time

Solution:

Relative Speed = (100 – 46) km/h

⇒ Relative Speed = 54 km/h

⇒ {(54 × 1000)/(1 × 3600)} m

⇒ 15 m/s

Distance covered in 20 sec = 15 m/s × 20 s = 300 m

∴ The length of faster train is 300 m.