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= 3 × 3,14 × 5 × 5
= 235, 5 cm2
atau
Lp = 3 × 22/7 × 5 ×5
= (3 × 22 × 5 × 5)/ 7
= 1550/7
= 220 cm2
Setau aku sih gitu, maaf kalo salah hehe