Tentukan luas dan volume dari
`Bangun ruang
• Tabung
r = 4 cm
t = 12 cm
Luas permukaan tabung
Lp = 2 × π × r × (r + t)
Lp = 2 × 3,14 × 4 × (4 + 12)
Lp = 2 × 3,14 × 4 × 16
Lp = 2 × 3,14 × 64
Lp = 401,92 cm²
Volume tabung
V = π × r² × t
V = 3,14 × 4² × 12
V = 3,14 × (4 × 4) × 12
V = 3,14 × 16 × 12
V = 602,88 cm³
Jawaban:
luas :
2πr(r+t)
= 2×3,14×4×(4+12)
=401,92cm²
volume:
πr²×t
=3,14×4²×12
=602,88cm³