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100 x 12= 1200
10 m = 100cm
kerangka = 1200:100 = 12 :)
= 4 (p + l + t)
= 4 (40 + 24 + 36)
= 4 (100)
= 400 cm
jika panjang kawat 1000 cm, maka dapat dibuat 2 kerangka balok dengan sisa kawat 200cm atau 2m
*kalo nggak ya 2,5 kerangka balok