Diketahui volume kerucut adalah 254,34. jika jari jarinya 4,5 cm . tentukan tinggi kerucut tersebut !
MahendraPutra1
Dik : V. kerucut = 254,34 cm^3 jari - jari = 4,5 dit : tinggi = ...? jawab V. kerucut = 254,34 1/3πr^3t = 254,34 1/3 × 3,14 × 4,5^2 × t = 254,34 1/3 × 3,14 × 20,25 × t = 254,34 1/3 × 63,585 × t = 254,34 21,195 × t = 254,34 t = 254,34 : 21,195 t = 12 cm
V. kerucut = 254,34 cm^3
jari - jari = 4,5
dit : tinggi = ...?
jawab
V. kerucut = 254,34
1/3πr^3t = 254,34
1/3 × 3,14 × 4,5^2 × t = 254,34
1/3 × 3,14 × 20,25 × t = 254,34
1/3 × 63,585 × t = 254,34
21,195 × t = 254,34
t = 254,34 : 21,195
t = 12 cm
jadi, tinggi kerucut = 12 cm