LENGKAP! Kunci Jawaban Matematika Kelas 9 Halaman 280 Sampai 283, Soal Nomor 1 Sampai 10! Tabung, Luas, Volume

Baca Juga: UJI KOMPETENSI 4, Kunci Jawaban Matematika Kelas 9 Halaman 261 Paling Lengkap! Kekongruenan dan Kesebangunan

Ket: V = volume tabung, L = luas permukaan tabung, r = jari-jari tabung, t = tinggi tabung.

Kunci jawaban Matematika kelas 9 halaman 280:

a) V = π x r x r x t
600π = π x 10 x 10 x t
t = 600π / 100π
t = 6 cm

b) L = 2π x r x (r + t)
120π = 2π x 5 x (5 + t)
5 + t = 120π / 10π
5 + t = 12
t = 7 cm

c) V = π x r x r x t
224π = π x 4 x 4 x t
t = 224π / 16π
t = 14 cm

Kunci jawaban Matematika kelas 9 halaman 280:

d) L = 2π x r x (r + t)
528π = 2π x r x (r + 13)
528π = 2π x r⊃2; + 13r
r⊃2; + 13r - 264 = 0
(r + 24) (r - 11)
r = 11 cm

e) L = 2π x r x (r + t)
450π = 2π x r x (r + 15)
450π = 2π x r⊃2; + 15r
r⊃2; + 15r - 225 = 0
r = 9 cm

f) V = π x r x r x t
294π = π x r x r x 6
r⊃2; = 294π / 6π
r = √49
r = 7 cm