Q. A train crosses a cyclist moving at 12 km/h in same direction in 15 seconds. If the train speed is 48 km/h, what is the train length?
✅ Correct Answer: (B)
150 m
Explanation: Relative speed = (48−12)×5/18 = 10 m/s → Length = 10×15 = 150 m.
Explanation by: Hriday
Relative speed = (48−12)×5/18 = 10 m/s → Length = 10×15 = 150 m.