To run a 10k in 55 min, hold 8'51" per mile, i.e. 6.78 mph (5'30"/km). At that pace: 5K in 27'30", 10K in 55'00", half marathon in 1h56'02", marathon in 3h52'04".
10K in 55 min: 8'51"/mile
1 track lap = 2'12"0
1 track lap = 2'12"0
To run a 10k in 55 min, hold 8'51" per mile, i.e. 6.78 mph (5'30"/km). At that pace: 5K in 27'30", 10K in 55'00", half marathon in 1h56'02", marathon in 3h52'04".