The record time for the Boston Marathon is 2 hours, 7 minutes, and 14 seconds. Over 26.2 miles, that's an average of about a 4 minute, 48 second mile, or about 12 mph.
18.75 km / hr.
-1.3- -1.2
The runner's average speed is greatest when they cover the most distance in the least amount of time. Therefore, the average speed is greatest when the slope of the distance-time graph is steepest.
The equation would be 2x+2(x+2)=28 when x= the speed of the slower runner. If you solve for x you get 6, which is the speed of the slower runner. Then if you add 2 you get the speed of the faster runner-8
The average speed of a runner who runs 500.0 m in 1.3 min is 6.41 m/s.
4.6ms
9 hours
4.60
he completes it in 69.9 seconds
The answer depends on the distance for the race. A marathon runner could not maintain the speed attained by a sprint runner.
The average speed of the runner is 1500m/(180 + 49.67) seconds = 6.531 m/s or 13 knots.
3 km in 5 min => his average speed is 36 km in 60 min, that is 36 km per hour. Clearly an extremely fast runner and way faster than MY average speed.