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= 4×(p+l+t)
= 4×(15+12+9)
= 4×36
= 144 cm
Banyak kerangka balok yg dpt dibuat
= 36 m/144 cm × 1 buah
= 3600 cm/144 cm × 1 buah
= 25 buah
panjang kerangka 1 balok = 4(15+12+9) = 4(36) = 144 cm
jadi jumlah kerangka yg bisa dibuat = 3600/144 = 25 buah