A train passes over a 400 m long bridge. If the speed of the train is 30 m/s and the train takes 20 s to cross the bridge, then the length of the train is

400 m

300 m

200 m

None

Given:

- Speed of train = 30 m/s

- Time to cross bridge = 20 s

- Length of bridge = 400 m

Total distance covered = Speed × Time = 30 × 20 = 600 m

So, length of train = 600 - 400 = 200 m

Correct answer: 200 m