Sebuah kerucut mempunyai diameter 10 cm dan tinggi 12 cm hitunglah a.volume kerucut ? b.luas selimut kerucut ? c luas alas kerucut ? D luas sisi kerucut ?
ananekusuma21
D = 10 cm → r = 5 cm t = 12 cm a) V kerucut = 1/3.phi.r².t = 1/3.3,14.5².12 = 4.3,14.25 = 314 cm kubik
b) s = √(r²+t²) = √(5²+12²) = √(25+144) = √169 = 13 cm jadi, Ls kerucut = phi.r.s = 3,14.5.13 = 204,1 cm²
t = 12 cm
a) V kerucut
= 1/3.phi.r².t
= 1/3.3,14.5².12
= 4.3,14.25
= 314 cm kubik
b) s = √(r²+t²)
= √(5²+12²)
= √(25+144)
= √169
= 13 cm
jadi,
Ls kerucut
= phi.r.s
= 3,14.5.13
= 204,1 cm²