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1cm² – 122500km²
3cm² – xkm²
x= 3· 122500= 367500km²= 36750000 ha
1cm = 350 km ( 1km = 100 000 cm)
1cm² = 122 500 km²
3* 122 500 = 367 500 km² = 36 750 000 ha
1km²= 100 ha