15.45km/h, my running speed on 5.15km 20:00

Time equivalence by distance

1km	2km	5km	10km
03:53	07:46	19:25	38:50
15km	20km	Half Marathon	Marathon
58:15	1:17:40	1:21:56	2:43:52

Split by km

km	Time/km
1 km	03:53
2 km	07:46
3 km	11:39
4 km	15:32
5 km	19:25
0.15 km	19:60

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