A train $300$ m long crossed a platform $900$ m long in $1$ min $12$ s. The speed of the train is :

To clear the platform, the train covers its own length plus the platform length, so the total distance is 300 m + 900 m = 1200 m. The time taken is 1 min 12 s, which equals 72 seconds. Using the speed formula, speed equals distance divided by time, giving 1200 divided by 72, or 16.66 meters per second. Multiplying by 18/5 to convert to kilometers per hour gives 60 km/hr. The speed of the train is 60 km/hr.

• Thanks
• Wrong explanation