Q. A train 200 m long crosses a platform in 40 seconds. If its speed is 54 km/h, what is the platform length?
✅ Correct Answer: (B)
400 m
Explanation: Speed = 15 m/s → Distance = 15×40 = 600 m → Platform = 600−200 = 400 m.
Explanation by: Hriday
Speed = 15 m/s → Distance = 15×40 = 600 m → Platform = 600−200 = 400 m.