Question

72 km 200 m − 48 km 600 m

Answer 1

1 km = 1000 m
72 km 200 m = 71 km 1200 m

72 km 200m - 48 km 600 m = 71 km 1200 m - 48 km 600 m = 23 km 600 m

or
72 km 200 m - 48 km 600 m = 72 200 000 m - 48 600 000 m = 23 600 000 m = 23 600 km

Answer 2

23.6 kilometers i think that should be our answer