He is running at an average speed of 21.31 mph.
3520 yards ! The time is irrelevant.
100 yards in 11 seconds is a pace of 18.6 mph
You ran 88 yards in 45 seconds at 4 mph.
90 mph = 220 yards in 5 seconds.
5.882353.....
About 975 yards.
100 yards in 10 seconds 20.45 miles per hour.
100 yards/6.7 seconds = 30.5292 miles per hour (rounded)
19 yards in 2.5 seconds equals a pace of 15.54 miles per hour.
Impossible to answer ! Yards is a measure of distance - seconds is a measurement of time !
It will take you 17.05 seconds to run 100 yards.
(40 yards) / (4.5 seconds) times (3,600 seconds per hour) / (1,760 yards per mile) =18 and 2/11 miles per hour