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1,5cm-150m
2,4cm-240m
2×(150+240)=780m²
1cm-100m
2,4cm-240m
1,5cm-150m
240m x 150x
ob=2×a + 2×b
ob=240×2 + 150×2
ob=480+300
ob=780metrów
obwod w rzeczywistości wynosi 780 metrow