Convert everything to the same unit, then do the addition. Remember that a kilometer is 1000 meters.
Either like this:
(Convert to meters) 3 km + 800 m... = 3000 m + 800 m...
Or:
(convert to km) 3 km + 800 m... = 3 km + 0.8 km...
300m is 0.3 km.
0.3 km
17
0.3 km
30000
8000m equals 8km
Which one is greater 300m or 3km
it show 8km is oceanic crust and 40km is continental crust
32 km2
8000m = 8km (meters divided by 1,000 = kilometers)
There are 1000 metres in one kilometre, so 800 metres is equal to 0.8 kilometres.
300m is 0.3km