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⇔ L alas + 2 L + 2 L
⇒ (p × l) + (2 × a × t) + (2 × a × t)
⇒ (32 × 18) + (2 × 18 ×[]) + (2 × 32 × [])
⇒ 576 + (18 × ) + (32 ×)
⇒ 576 + (18 ) + (32 )
⇒ 576 + (18 × 20) + (32 × 15)
⇒ 576 + 360 + 480
⇒ 1.416 cm² (C)