16.36km/h, my running speed on 21.097km 1:17:20

Time equivalence by distance

1km	2km	5km	10km
03:40	07:20	18:20	36:39
15km	20km	Half Marathon	Marathon
54:59	1:13:19	1:17:20	2:34:40

Split by km

km	Time/km
1 km	03:40
2 km	07:20
3 km	10:60
4 km	14:40
5 km	18:20
6 km	21:60
7 km	25:40
8 km	29:19
9 km	32:59
10 km	36:39
11 km	40:19
12 km	43:59
13 km	47:39
14 km	51:19
15 km	54:59
16 km	58:39
17 km	1:02:19
18 km	1:05:59
19 km	1:09:39
20 km	1:13:19
21 km	1:16:59
0.097000000000001 km	1:17:20

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