Dik t = 30 cm, k=66 cm, Π= 22/7 berapakah volume kerucut?
5dregensleyer
Kliling alas = 66 2 x π x r = 66 2 x 22/7 x r = 66 44/7 x r = 66 r = 66 x 7/44 r = 10,5 cm volum = 1/3 x π x r² x t = 1/3 x 22/7 x 10,5 x 10,5 x 30 = 22 x 1,5 x 10,5 x 10 = 33 x 105 = 3465 cm³
jawabannya adalah 3465 cm³
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ananekusuma21
K alas = 66 phi.d = 66 22/7.d = 66 d = 66:22/7 d = 66x7/22 d = 3x7 d = 21 cm → r = 10,5 cm jadi, V kerucut = 1/3.phi.r².t = 1/3.22/7.10,5.10,5.30 = 10.22.1,5.10,5 = 3465 cm kubik
2 x π x r = 66
2 x 22/7 x r = 66
44/7 x r = 66
r = 66 x 7/44
r = 10,5 cm
volum = 1/3 x π x r² x t
= 1/3 x 22/7 x 10,5 x 10,5 x 30
= 22 x 1,5 x 10,5 x 10
= 33 x 105
= 3465 cm³
jawabannya adalah 3465 cm³
phi.d = 66
22/7.d = 66
d = 66:22/7
d = 66x7/22
d = 3x7
d = 21 cm → r = 10,5 cm
jadi,
V kerucut
= 1/3.phi.r².t
= 1/3.22/7.10,5.10,5.30
= 10.22.1,5.10,5
= 3465 cm kubik