15.49km/h, my running speed on 3.75km 14:31

Time equivalence by distance

1km	2km	5km	10km
03:52	07:45	19:21	38:43
15km	20km	Half Marathon	Marathon
58:04	1:17:25	1:21:40	2:43:20

Split by km

km	Time/km
1 km	03:52
2 km	07:45
3 km	11:37
0.75 km	14:31

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