Strictly speaking there are no hurdles in a 400m race, but in a 400mH race there are ten hurdles per lane.
4 lengths of 25m (not 25km) is 100m So 4x4=16 lengths to make 400m
400m
Strictly speaking there are no hurdles in a 400m race, but in a 400mH race there are ten hurdles per lane.
2.5 tenths.
2 laps-400m each
20.25 s
The answer depends on the speed at which you walk.
3 significant figures
A 400m dash is 0.4km.
600metres.
3.75