21.51km/h, my running speed on 3km 08:22

Time equivalence by distance

1km	2km	5km	10km
02:47	05:35	13:57	27:53
15km	20km	Half Marathon	Marathon
41:50	55:47	58:50	1:57:41

Split by km

km	Time/km
1 km	02:47
2 km	05:35
3 km	08:22

Calculate your running speed

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