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.
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If someone runs 10 miles in 90 minutes their average speed is 6.67 mph
4.6ms
4.60
the runner who runs a kilometer in 4 minutes kilometer is about 0.8 of a mile, so if take someone double to run a mile, they're worse.
To calculate the runner's average speed, you would use the formula: speed = distance ÷ time. In this case, the distance is 100 meters and the time is 15 seconds. Therefore, the average speed of the runner would be 100 meters ÷ 15 seconds = 6.67 meters per second.