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lbr = 18 cm
t limas = 12 cm
a. luas sisi limas
= luas alas + l sisi tegak
= p × l + (a×t/2×2) + (a×t/2×2)
= 32 × 18 + (32×12/2×2) + (18×12/2×2)
= 576 + 384 + 216
= 1.176 cm2
b. v limas
= 1/3 × l alas × t limas
= 1/3 × p×l × t limas
= 1/3 × 32×18 × 12
= 576 × 4
= 2.304 cm3