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= 4 (7 + 3 + 5)
= 4 (15)
= 60 cm
ada dua balok
2 x 60 = 120 cm
= 1,2 m
panjang sisa kawat
1,5 m - 1,2 m = 0,3 m
= 30 cm
= 28 + 12 + 20
= 60 cm x 2 buah = 120 cm
panjang kawat= 1,5 m = 150cm
150 - 120
= 30 cm