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Lp = 2×(12×4 + 12×3 + 4×3)
Lp = 2×(48 + 36 + 12)
Lp = 2×96
Lp = 192 cm²
= 2 (12×4 + 12×3 + 4×3)
= 2 (48 + 36 + 12)
= 2 (96)
= 192 cm²