Baca Juga: Kunci Jawaban Bahasa Indonesia Kelas 9 Halaman 157, Menyusun Cerita Inspiratif dengan Tema Botol
c. Diketahui :
r = 6 cm
t = 10 cm
s2 = 10^2 + 6^2
s = V100 + 36
= V136
= V4.34
= 2 V34 cm
luas = πr (s +r)
= π.6cm (2V34 cm + 6 cm)
= π.6cm. 2cm (V34 +3)
= 12(3 + 34 )π cm2
volume = 1/3.πr2.t
v = 1/3. π. 6cm.6 cm.10 cm
= 120π cm3
d. r = 7 m
s = 25 m
t = ?
t2 = 25^2 - 7^2
t = V625 - 49
= V576
t = 24 m
luas = πr (s +r)
= π.7 m(25m + 7m)
= π.7m. 32 m
= 224 π m2
volume = 1/3.πr2.t
v = 1/3.π.7m.7m.24 m
= 392π cm3
e. Diketahui :
t = 3 cm
s = 4 cm