Final answer:
The speed of the train is calculated by dividing the distance traveled by the time taken. The train covers 150 miles in 2.5 hours, resulting in a speed of 60 miles per hour (mph).
Step-by-step explanation:
To calculate the speed of the train, we need to use the formula:
Speed = Distance ÷ Time
The train travels 150 miles in 2 1/2 hours, which is the same as 2.5 hours. Using the formula:
Speed = 150 miles ÷ 2.5 hours = 60 miles per hour (mph)
Therefore, the correct answer is 1) 60 mph.
Note that the provided references mentioning different distances and speeds are not needed to solve this specific problem since we are given both the total distance and time for this train's journey.