15.75km/h, my running speed on 2.1km 08:00

Time equivalence by distance

1km	2km	5km	10km
03:49	07:37	19:03	38:06
15km	20km	Half Marathon	Marathon
57:09	1:16:11	1:20:22	2:40:45

Split by km

km	Time/km
1 km	03:49
2 km	07:37
0.1 km	08:00

Calculate your running speed

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