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2m = 200 cm
Panjang kawat yang tersisa = 200 - (4×(18+10+4))
= 200 - 128
= 72 cm
= 4(18+10+4)
= 4(32)
= 128cm
potongan kawat sepanjang 2m = 200cm
Panjang kawat yang tersisa = panjang kawat-panjang kawat yang dibutuhkan
= 200 - 128
Panjang kawat yang tersisa = 72cm