Inter-School Sports Meet . Race

Have you heard about 1500m or 3000 m race ?
(1000 metres make 1 kilometre and 500 metres make half a kilometre)

So you can say ---

In a 1500 metres race people run ----- km
[toggle title="Answer" float="left" width="100px" margin="0 20px 20px 0" status="closed"] 1.5 km[/toggle]

In a 3000 metres race people run ----- km
[toggle title="Answer" float="left" width="100px" margin="0 20px 20px 0" status="closed"] 3 km[/toggle]