Final answer:
The average speed of the train for the round trip from Lahore to Karachi and back is calculated by dividing the total distance traveled, 12,000 km, by the total time taken, 50 hours, which results in an average speed of 240 km/hr.
Step-by-step explanation:
The average speed of a train is the total distance traveled divided by the total time taken to travel that distance. In the given scenario, the train traveled a distance of 6,000 km from Lahore to Karachi and back, so the total distance traveled is 12,000 km. The total time taken is 22 hours one way and 28 hours on the return, giving us a total of 50 hours.
Therefore, to calculate the average speed, we need to divide the total distance by the total time:
- Average speed = Total distance / Total time = 12,000 km / 50 hours = 240 km/hr.
- The average speed of the train is 240 km/hr.