4.5km/h, my running speed on 2.1km 28:00

Time equivalence by distance

1km	2km	5km	10km
13:20	26:40	1:06:40	2:13:20
15km	20km	Half Marathon	Marathon
3:19:60	4:26:40	4:41:18	9:22:36

Split by km

km	Time/km
1 km	13:20
2 km	26:40
0.1 km	27:60

Calculate your running speed

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