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=142.560/2520
=56,57 cm2
=3,14 . 12²
=3,14 . 144cm
=452,16 cm²
L tiap potong = L seluruhnya : jumlah potongan
=452,16 : 8
=56,52 cm²
maaf ya klo salah.. saya udah berusaha dan itu hasil dari saya