tolong jawab ya kak plsss
5. Luas Permukaan Gabungan
= Lp Balok + Lp Limas
= 2 × ( PL + PT + LT) + Luas Alas + 4 × Alas × Tinggi/ 2
= 2 × (( 18 × 18 ) + ( 18 × 5 ) + ( 18 × 5 )) + ( 18 × 18 ) + 4 × 18 × 12 / 2
= 2 × ( 324 + 90 + 90 ) + 324 + 4 × 9 × 12
= 2 × 504 + 324 + 4 × 108
= 1008 + 324 + 432
= 1008 + 756
= 1.764 Cm².
