1.Tinggi sebuah kerucut 21cm. Apabila volume kerucut 8792m³.Hitunglah jari jari kerucut ! 2. volume kerucut 314cm³, jika jari-jari alasnya 5cm. Hitunglah panjang garis pelukis kerucut.
nisem
1. v = 1/3×3,14×r²×21 8792=3,14×r²×7 r= 8792:(3,14×7) =√400=20 cm
2. v = 1/3×3,14×5²×t 314=1/3×3,14×5×5×t r=314:1/3:3,14:25 =314×3/1:(3,14×25) =942:78,5= 12 cm
8792=3,14×r²×7
r= 8792:(3,14×7)
=√400=20 cm
2. v = 1/3×3,14×5²×t
314=1/3×3,14×5×5×t
r=314:1/3:3,14:25
=314×3/1:(3,14×25)
=942:78,5= 12 cm
s=12²+5²
144+25=√169=13 cm