To calculate the velocity of the train, we can use the formula:
velocity = distance / time
In this case, the distance traveled by the train is 100,000 miles, and the time taken is 2 hours.
Plugging these values into the formula, we have:
velocity = 100,000 miles / 2 hours velocity = 50,000 miles/hour
Therefore, the velocity of the train is 50,000 miles/hour.