The average speed should be 600 miles per hour. This is because 1300 divided by 2 1/6 in a calculator equals 600.
Another way is using a speed calculator website. 2 1/6 hours = 2 hours and 10 minutes. When you put that into a speed calculator with the distance, you get 600 miles per hour.
Here is the website if you want to use it
https://www.omnicalculator.com/everyday-life/speed
