Q. Two trains cross each other in 18 seconds moving in opposite directions. Their speeds are 50 km/h and 70 km/h. What is their total length?
✅ Correct Answer: (C)
600 m
Explanation: Relative speed =120 km/h =33.33 m/s → Length = 33.33×18 ≈600 m.
Explanation by: Hriday
Relative speed =120 km/h =33.33 m/s → Length = 33.33×18 ≈600 m.