Kunci Jawaban Matematika Kelas 9 Halaman 307, 308, 309, 310, 311, 312, 313 Lengkap 20 Soal Uji Kompetensi 5

Lp = 31,4 cm × (19 cm)

Lp = 596,6 cm²

(b) Luas permukaan tabung

Lp = 2πr(r + t)

Lp = 2 × 3,14 × 12 dm × (12 dm + 40 dm)

Lp = 75,36 dm × (52 dm)

Lp = 3.918,72 dm²

(c) Luas permukaan tabung

Lp = 2πr(r + t)

Lp = 2 × 3,14 × 1 m × (1 m + 2 m)