L. Permukaan
= (9 × 4 × 4) + (3 × 12 × 4)
= 144 + 144
= 288 cm2 (D)
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L. Permukaan
= (9 × 4 × 4) + (3 × 12 × 4)
= 144 + 144
= 288 cm2 (D)