Question

A train 150 m long travels at 54 km/h. How long will it take to cross a 250 m platform?

Solution

1. The train must cover train length + platform length = 150 + 250 = 400 m.
2. Convert 54 km/h to m/s: 54 x 5/18 = 15 m/s.
3. Time = distance / speed = 400/15 = 80/3 seconds.
4. Therefore, the train takes 26 2/3 seconds.