14.97km/h, my running speed on 4.9km 19:38

Time equivalence by distance

1km	2km	5km	10km
04:00	08:01	20:02	40:04
15km	20km	Half Marathon	Marathon
1:00:06	1:20:08	1:24:32	2:49:04

Split by km

km	Time/km
1 km	04:00
2 km	08:01
3 km	12:01
4 km	16:02
0.9 km	19:38

Calculate your running speed

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