12.6km/h, my running speed on 4.2km 20:00

Time equivalence by distance

1km	2km	5km	10km
04:46	09:31	23:49	47:37
15km	20km	Half Marathon	Marathon
1:11:26	1:35:14	1:40:28	3:20:56

Split by km

km	Time/km
1 km	04:46
2 km	09:31
3 km	14:17
4 km	19:03
0.2 km	20:00

Calculate your running speed

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