Dik = Volume kerucut = 314 cm2 . jari - jari alasnya = 5 cm π = 3,14 Dit : Panjang garis pelukisnya ... cm

V=⅓πr²t
t=3V ÷ πr²
t=(3x314) ÷ (3,14 x 5²)
t=300÷25
t=12 cm

s²=t²+r²=12²+5²=144+25=169
s=√169=13 cm

314 = 1/3. 3,14 . [tex] 5^{2} . t [/tex]
314 = 78,5 / 3 . t
t = 314 / 26,2
t = 12
 [tex] s^{2} = t^{2} . r^{2} s = \sqrt{ 12^{2} . 5^{2} } s = \sqrt{3600} = 60[/tex]