It is: 5.3 km
It is a 5*103 m run.
First, convert .5 km to meters. Since it's kilometers which has an exponent of 3, move the decimal three places to the right. .5km = 500 m. Next, compare. 500 m is definitely bigger than only 300 m.
According to Google @ http://www.google.com/search?q=5km+to+miles 5km is equal to 3.10685596 miles.
5km is about 3 miles.
5km = 5000m = 500 000cm, so 1cm goes into 5km 500 000 times
25 square kms
600km is 120 times greater than 5km.
9/5km or 1 4/5km
600m:5km = 600m:5000m = 600/5000 = 3/25
5km
3.107
3.11 miles.