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1km -1000m
1km²-1000000m²
3km²-3000000km²
a=100m²
B-4 500 m² = 0,45 ha
ha=10 000m²
C- 0,4 m² = 4 000 cm²
m²=10 000cm²
D-3 km² = 300 000 m²
km²=1 000 000m²
Odpowiedź D jest fałszywa.