Khalil took a train from San Francisco to San Jose, which is a distance of 54 miles. The train took 45 minutes for the trip. What was the average speed of the train expressed in miles per hour?

To find the average speed in miles per hour, you will create a rate using the number of miles to the number of hours in 45 minutes.

54 miles in 0.75 hours (45 minutes)

To make this a unit rate or miles per hour, divide the number of miles by the time.

54/0.75 = 72 mph

The train traveled an average speed of 72 mph.