A person boarded an express train on 30 th August, 2015 at Ahmedabad for Trivandrum. The train departed from Ahmedabad at 13.30 h and reached Trivandrum at 7.30 h on 1 st September, 2015. If the distance between Ahmedabad and Trivandrum is 2268 km, the average speed of the train between the two stations was:
1. 42 m/s
2. 15 m/s
3. 9 m/s
4. 54 m/s