Final answer:
To find how far the train travels in 2 hours, one must first determine the train's average speed, which is 60 mph. Then, multiply this average speed by the new time period to get the distance: 120 miles.
Step-by-step explanation:
The student is asking about determining the distance a train would travel at a constant speed over a different time period than originally given. Specifically, if a train can travel 150 miles in 2 2/1 (which is 2.5) hours, we want to find out how far it would travel in 2 hours. To answer this, we first calculate the train's average speed by dividing the distance by the time.
Average speed = Distance / Time = 150 miles / 2.5 hours = 60 miles per hour
Once the average speed is known, we can calculate the distance traveled in any other time period by multiplying the average speed by the new time period:
Distance in 2 hours = Average speed * Time = 60 mph * 2 hours = 120 miles