Panjang Unsur Tabung! Kunci Jawaban Matematika Kelas 9 Halaman 280 Paling Lengkap, 10 Soal untuk Latihan Siswa

Luas permukaan tabung = (2π x r x r) + (2π x r x t) = 2 x r x (r + t)
Volume tabung = π x r x r x t

a) Luas = (2π x 4 x 4) + (2π x 4 x 10)
= 32π + 80π
= 112π cm²

Volume = π x 4 x 4 x 10
= 160π cm³

b) Luas = (2π x 7 x 7) + (2π x 7 x 6)
= 98π + 84π
= 182π cm²

Volume = π x 7 x 7 x 6
= 294π cm³

c) Luas = (2π x 4 x 4) + (2π x 4 x 12)
= 32π + 96π
= 128π cm²

Volume = π x 4 x 4 x 12

= 192π cm³

Kunci jawaban Matematika kelas 9 halaman 280:

d) Luas = (2π x 1 x 1) + (2π x 1 x 8)
= 2π + 16π
= 18π m²