With any of the common GPS based performance meters or one of the many "dyno" or "speedometer" type applications available for most smart phones.
Race distance / Race time = average speed i.e.: 300 km / 2 hours = 150 kph average.
Cyclists average speed = (total distance of the race)/(time it took him, from starting gun to finish line)
Average speed is 40 miles per hour.
185
Jeff Gordon was the winner of the 2005 Daytona 500 race. His average speed was 135.173 miles per hour. His qualifying speed for the race was 188.312 miles per hour.
The answer depends on the distance for the race. A marathon runner could not maintain the speed attained by a sprint runner.
And just how long was this race? His average speed for the first two minutes of this so called race is 300 meters per minute. Other than that, I am clueless.
Average speed of 16.13409 mph. ( 25.9653 km/ph ).
175-185 mph
I do hope you mean racing horse. An average speed for a Thoroughoutbred race horse is 40 miles per hour.
The average speed was 24km/h
According to race results the winner of the first Indy 500 averaged 74.60 mph. The average speed of the slowest car to actually finish the race was 67.73. Of the 12 cars that finished the average speed was 70.74 mph.