tolong di jawab soal nomor 3

3. a. Luas permukaan =
- 10 cm x 4 cm = 40 cm²
- 10 cm x 8 cm = 80 cm²
- 8 cm x 4 cm = 32 cm²
= 40 cm² + 80 cm² + 32 cm² = 152 cm² x 2 = 304 cm²
b. Volume = 10 cm x 4 cm x 8 cm = 320 cm3
Semoga ^_^ membantu & selamat mengerjakan!

Luas permukaan balok =
2 × (p×l) + (p×t) + (l×t)
2 × (10 cm × 4 cm) + (10 cm × 8 cm) + (4 cm × 8 cm)
2 × (40 cm² + 80 cm² + 32 cm²)
2 × 152 cm²
= 304 cm²



Volume balok =
Panjang × lebar × tinggi
10 cm × 4 cm × 8 cm
= 320 cm³



Semoga membantu ^^
Maaf kalau salah