Question

A train 300 metres long is running at a speed of 25 metres per second. It will cross a bridge of 200 meters in:
1. 5 seconds
2. 10 seconds
3. 20 seconds
4. 25 seconds

Answer 1

Correct Answer - Option 3 : 20 seconds

Given:

Length of the train = 300 m

Speed of the train = 25 m/s

Length of the bridge = 200 m

Concept used:

Time to cross bridge = (Length of the train + Length of the bridge)/speed of the train

Calculation:

Time taken to cross bridge = (300 + 200)/25 = 20 S

∴ The train will take 20 s to cross the bridge.