Q. A train crosses a man running at 9 km/h in opposite direction in 12 seconds. If the train speed is 45 km/h, what is its length?
✅ Correct Answer: (C)
180 m
Explanation: Relative speed = (45+9)×5/18 = 15 m/s → Length = 15×12 = 180 m.
Explanation by: Hriday
Relative speed = (45+9)×5/18 = 15 m/s → Length = 15×12 = 180 m.