At 12.50 km/h your pace is 4'48" per kilometre (7'43"/mile). 5K in 24'00", 10K in 48'00", half marathon in 1h41'16", marathon in 3h22'32".
12.50 km/h = 4'48"/km
1 track lap = 1'55"2
1 track lap = 1'55"2
At 12.50 km/h your pace is 4'48" per kilometre (7'43"/mile). 5K in 24'00", 10K in 48'00", half marathon in 1h41'16", marathon in 3h22'32".