Answer:
28 dm, 30277 cm, 629000 mm, 1.2 km
Step-by-step explanation:
Convert all the lengths to a single unit.
Let us convert them to m
1 dm = 0.1 m
28 dm = 2.8 m
1 mm = 0.001 m
629000 mm = 629 m
1 km = 1000 m
1.2 km = 1200 m
1 cm = 0.01 m
30277 cm = 302.77 m
So, arranging them from shortest to longest we get
2.8 m, 302.77 m, 629 m, 1200 m
or
28 dm, 30277 cm, 629000 mm, 1.2 km