1 km = 1000 m = 100 000 cm = 10^5 cm
1km^2=(10^5)^2cm^2
600km^2=6*10^2*10^{10}cm^2=6*10^{12}cm^2
\frac{P_1}{P_2}=k^2
\frac{6*10^{12}}{P_2}=(5*10^6)^2
\frac{6*10^{12}}{P_2}=2,5*10*10^{12}
\frac{6*10^{12}}{P_2}=2,5*10^{13}
P_2=\frac{6*10^{12}}{2,5*10^{13}}=2,4*10^{-1}=0,24[cm^2] <–odpowiedź