tolong no 29 pakai caranya

bismillah
rumus luas permukaan balok :
2 x (pxl) + 2 x (pxt) + 2 x (lxt) =
2 x (12x8) + 2 x (12x24) + 2 x (8x24) =
2 x 96 + 2 x 288 + 2 x 192 =
192 + 576 + 384 =
1152 cm² (pilihan B)
maaf kalau salah

Matematich - Bangun Balok

Jawaban :

Luas permukaan :

= 2 ( p × l + p × t + l × t )
= 2 ( 24 × 8 + 24 × 12 + 8 × 12 )
= 2 ( 192 + 288 + 96 )
= 2 ( 576 )
= 1.152 cm² ✔