400 meters in 20 seconds = 44.74 mph
between 55.4mph.- 89.4
A classroom doorway is how many meters tall?
It depends on the girl's physical abilities. A good 400 runner for a 7th grader should range from 60 to 65 seconds.
400 meters in lane 1
It depends on his/her age and how fast is he/she.
If you covered 400 meters in 6.3 minutes, that's 400 m/6.3 min or about 63.492 meters per minute, or about 1.058 meters per second. That's about 2.37 miles per hour, or a walk.
Sprints like 100- 400 meters use the most fast twitch fibers.