Q. Two trains of equal length cross each other in 12 seconds while moving in opposite directions at 45 km/h and 63 km/h. What is the length of each train?
✅ Correct Answer: (C)
180 m
Explanation: Relative speed = (45+63)×5/18 = 30 m/s; Total length = 30×12=360 m → each =180 m.
Explanation by: Hriday
Relative speed = (45+63)×5/18 = 30 m/s; Total length = 30×12=360 m → each =180 m.