A train 100 metres long passes a platform 400 metres long in 25 seconds. What is the speed of the train in km/h?
Q1. A train 100 metres long passes a platform 400 metres long in 25 seconds. What is the speed of the train in km/h?
Answer: 72 km/h
Explanation: The train covers 100 plus 400, totalling 500 m in 25 s. Speed is 20 m/s, which converts to 72 km/h.