150 m long train running with the speed of 90 km/h to cross

Home » Aptitude » Problem on Trains » Question

150 m long train running with the speed of 90 km/h to cross a bridge in 26 s .What is the length of the bridge?

1. 500 m
2. 600 m
3. 659 m
4. 550 m

Correct Option: A

Let length of bridge be L m.
We know, Speed = Distance/Time

According to the question,
90 x 5/18 = 150 + L/26
⇒ 25 x 26 = 150 + L
⇒ 650 = 150 + L
∴ L = 500 m