He is running at approximately 14.91 miles per hour.
About 24 miles per hour.
His pace is 8.4 miles per hour.
Running the 100-meter dash in 12.7 seconds is the same as running the 40-yard dash in 4.645 seconds.
Approx 18.56 mph.
11.184 681 46 mile/hour (mph) this is the site I used: http://www.onlineconversion.com/speed_common.htm
Approx 16.17 mph.
Running 40 yards in 4.2 seconds is equal to running 19.5 MPH.
If a runner runs a mile in 4 minutes 30 seconds he is averaging 13.33 MPH over the total distance.
It depends on the runner.