Kunci Jawaban Matematika Kelas 9 Semester 2 Halaman 307, 308, 309, 310 Bangun Ruang Sisi Lengkung

a) Volume = π x 5 x 5 x 14
= 350π cm3

b) Volume = π x 12 x 12 x 40
= 5760π dm3

c) Volume = π x 1 x 1 x 2
= 2π m3

d) Volume = 1/3 x π x 9 x 9 x 12
= 324π cm3

e) Volume = 1/3 x π x 8 x 8 x 15
= 320π dm3

f) Volume = 1/3 x π x 1 x 1 x √3
= √3/3π m3

g) Volume = 4/3 x π x 12 x 12 x 12
= 2304π cm3

h) Volume = 4/3 x π x 5 x 5 x 5
=500/3π m3

i) Volume = 4/3 x π x 8 x 8 x 8
= 2048/3π dm3

j) Volume = π x 6 x 6 x 9
= 324π m3

k) Volume = 1/3 x π x 6 x 6 x 9
= 108π dm3

l) Volume = 4/3 x π x 8 x 8 x 8
= 2048/3π cm3

3. Tentukan rumus luas permukaan bangun-bangun pada tabel di atas.

Jawaban:

- Setengah tabung = πr(r + t) + 2rt