Q. A train 180 m long is running at 54 km/h. How long will it take to cross a platform 120 m long?
✅ Correct Answer: (B)
20 sec
Explanation: Total distance = 180+120=300 m; Speed = 15 m/s → Time = 300/15 = 20 sec.
Explanation by: Hriday
Total distance = 180+120=300 m; Speed = 15 m/s → Time = 300/15 = 20 sec.