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1cm - 100m
1cm² - 10 000m²
x - 18 000m²
x / 18 000 = 1/10 000
x / 18 = 1/10
x = 1,8 cm²
Tak mi się wydaje ;)
1:10 000
1cm-10000cm
1cm2-100000000cm2
18 000 m²=180000000cm2
1cm2-100000000cm2
x-180000000cm2
x= 180000000cm2/100000000cm2
x=1,8 cm2