Have you heard about marathon races in which people have to run about 40 kilometres ? People run marathon on roads because the track of the stadium is only 400 metres. 10 rounds of a stadium track = ----- km [toggle title="Answer" float="left" width="100px" margin="0 20px 20px 0" status="closed"] 4 km[/toggle] So,if you run a marathon on a stadium track, you will have to complete ------ rounds! [toggle title="Answer" float="left" width="100px" margin="0 20px 20px 0" status="closed"] 100 [/toggle]