18km/h, my running speed on 3km 10:00

Time equivalence by distance

1km	2km	5km	10km
03:20	06:40	16:40	33:20
15km	20km	Half Marathon	Marathon
49:60	1:06:40	1:10:19	2:20:39

Split by km

km	Time/km
1 km	03:20
2 km	06:40
3 km	09:60

Calculate your running speed

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