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4cm·20 000=80 000cm=800m
b) 20cm,1:120 000
20cm·120 000=2 400 000cm=24 000m=24km
c) 3cm, 1:8 000 000
3cm·8000000=24 000 000cm=240 000m=240km
d) 23mm,1:7 000
23mm=2,3cm
2,3cm·7 000=16 100cm=161m
e)5mm,1:44 000 000
5mm=0,5cm
0,5cm·44 000 000=22 000 000cm=220 000m=220km