If a train travels at a speed of 60 miles per hour, it means that in one hour (60 minutes), it covers a distance of 60 miles.
To calculate the distance traveled in 3.5 hours, you can multiply the speed (60 miles per hour) by the time (3.5 hours):
Distance = Speed × Time
Distance = 60 miles/hour × 3.5 hours
Distance = 210 miles
Therefore, the train will travel a distance of 210 miles in 3.5 hours.