Volume suatu kerucut 1.256 cm3,tinggi kerucut 12cm dan p=3,14. Hitunglah panjang jari-jari alas kerucut #tolong bantuin jwb dan di kasih caranya
jefrynofri29
Diket : V=1256cm^3 t =12 cm phi =3,14 dit :r=? jawab: 1/3.phi.r^2.t =VKerucut 1/3x3,14xr^2x12 =1256 cm^3 3,14 x 4 x r ^2 = 1256 12,56x r^2 = 1256 r^2 =1256/12,56 r = Г100 r =10 cm
t =12 cm
phi =3,14
dit :r=?
jawab:
1/3.phi.r^2.t =VKerucut
1/3x3,14xr^2x12 =1256 cm^3
3,14 x 4 x r ^2 = 1256
12,56x r^2 = 1256
r^2 =1256/12,56
r = Г100
r =10 cm