To run a half marathon in 1:50, hold 8'23" per mile, i.e. 7.15 mph (5'13"/km). At that pace: 5K in 26'04", 10K in 52'08", half marathon in 1h50'00", marathon in 3h40'00".
Half marathon in 1:50: 8'23"/mile
1 track lap = 2'05"1
1 track lap = 2'05"1
To run a half marathon in 1:50, hold 8'23" per mile, i.e. 7.15 mph (5'13"/km). At that pace: 5K in 26'04", 10K in 52'08", half marathon in 1h50'00", marathon in 3h40'00".