15km/h, my running speed on 7.5km 30:00

Time equivalence by distance

1km	2km	5km	10km
04:00	08:00	20:00	40:00
15km	20km	Half Marathon	Marathon
1:00:00	1:20:00	1:24:23	2:48:47

Split by km

km	Time/km
1 km	04:00
2 km	08:00
3 km	12:00
4 km	16:00
5 km	20:00
6 km	24:00
7 km	28:00
0.5 km	30:00

Calculate your running speed

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