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l = 8 cm
t = 6,5 cm
Rusuk = 4(p + l + t)
= 4(18 + 8 + 6,5)
= 4(32,5)
= 130 cm
= 1,3 m
Jadi kawat yang dibutuhkan adalah 1,3 m (b).
4 (18+8+6,5)
4 (32,5) = 130 cm= 1,3 m