18.7 miles in 100 seconds = 673.2 miles per hour.
100 yards/6.7 seconds = 30.5292 miles per hour (rounded)
100 yards in 10 seconds 20.45 miles per hour.
36.466 miles per hour
100 meters in 12 seconds is 18.64 miles per hour.
100 meters in 11.8 seconds = 18.96 miles per hour.
100 meters in 9.69 seconds is 23.3 miles per hour.
Traveling 100 meters in 80 seconds equates to an average speed of 2.79 miles per hour.
100 meters/14.00 seconds (1 mile/1609 meters)(3600 seconds/1 hour) = 15.982 miles per hour
100 meters in 9.2 seconds is 24.3 miles per hour.
It is an average speed of 20.45 miles per hour.
100 meters per 4.69 seconds equates to 47.7 miles per hour.
Well, if you are mowing in a straight line and you mow 100 feet of grass in 30 seconds, this means you are averaging 2.27 miles per hour.