Lp prisma=2×Lalas + Kalas×tinggi prisma
=2×p×l + 2(p+l)×40
=2×15×6 + 2(15+6)×40
=180 +1680
=1860 cm²
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Lp prisma=2×Lalas + Kalas×tinggi prisma
=2×p×l + 2(p+l)×40
=2×15×6 + 2(15+6)×40
=180 +1680
=1860 cm²