Q. Two trains moving in the same direction at 60 km/h and 40 km/h cross each other in 15 seconds. What is the sum of their lengths?
✅ Correct Answer: (B)
100 m
Explanation: Relative speed = (60−40)×5/18 = 5.56 m/s → Length = 5.56×15 ≈ 83 m (closest option 100 m).
Explanation by: Hriday
Relative speed = (60−40)×5/18 = 5.56 m/s → Length = 5.56×15 ≈ 83 m (closest option 100 m).