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3 km² = 0,3 ha
0,02 km² = 400m² = 0,04 ha
620m² = 0,062 ha
135a = 13 500 = 1,35 ha
b)
30km² = 300 000 a
0,5 km² = 5 000 a
1,2 ha = 12 000 m² = 12 a
470m² = 4,7 a
Nie jestem pewny .
3km²=300ha
0,02km²=2ha
620m²=0,0620ha
135a=1,35ha
b)
30km²=300000a
0,5km²=5000a
1,2ha=120a
470m²=4,7a