tolong tolong tolong

Vbalok=3×5×8=120
Vprisma=8×3×4=96
Total=216

Volume Prisma segitiga = Luas alas × tinggi prisma
= (a×t/2) × tinggi prisma
= (3×4/2) × 8
= 48 cm³
Volume balok = p×l×t
= 8×3×5
= 120 cm³
Volume gabungan = 120+48 = 168 cm³ (B)

Mohon maaf jika salah..
Semoga membantu jika benar.. ^_^