train.
47.60 by Marita Koch.
Chewbacca
Most indoor running tracks are 200M, some are also odd distances like 140 or 150M, but you will sometimes stumble upon indoor 400M tracks (They are pretty rare).
the total distance you run is 400m. so it is the same thing. all 4x100 means is that there are 4 people running 100 meters.
390cm but most running tracks have 8 lanes
I'm not sure what's an average time but a 51 second 400m is very good for a 16 year old. (Top in Ontario for sure).
400m
A standard running track is 400m.
No, he retired from athletics in 2001. He still holds the 400m world record set in 1999.
10,000 / 400 = 25
In my opinion, it is not if you are running anything more than a 55m dash. Since there are so many turns, you most likely won't get as good times as on a 400m track.