3km kwadratowe to: A.3*10^6mm^2 B.3*10^36mm^2 C.3*10^12mm^2 D.3*10^10mm^2 3km kwadratowe to: A.3*10^6mm^2 B.3*10^36mm^2 C.3*10^12mm^2 D.3*10^10mm^2