Running 1000m+ walking 500m = 12min (the left and right sides of the formula are divided by 2).
Running 3000 meters+walking 500 meters =22 minutes
The above formula is very poor,
Run 2000 meters = 10 minutes.
Running = 200m/min
Solution 2:
Run 2000m+ walk 1000m =24 minutes.
Run 6000m+walk1000m =44 minutes (multiply left and right by 2).
The above formula is very poor,
Run 4000m =20 points.
Running = 200m/min