Q. Two trains cross each other in 15 seconds moving in opposite directions at 54 km/h and 36 km/h. What is their total length?
✅ Correct Answer: (B)
375 m
Explanation: Relative speed = (54+36)×5/18 = 25 m/s → Length = 25×15 = 375 m.
Explanation by: Hriday
Relative speed = (54+36)×5/18 = 25 m/s → Length = 25×15 = 375 m.