Formula for volume of cone:
V = [tex]\pi r^{2} \frac{h}{3}[/tex]
r = 6 km
h = 12 km
V = [tex]\pi 6^{2} \frac{12}{3}[/tex]
V = [tex]\pi 36*4[/tex]
V = [tex]\pi 144[/tex]
V = 452.389 km^3 <----------------------Using the calculators pi button
V = 452.16 km^3 <-------------------------Using 3.14 for pi
Hope this helped!
~Just a girl in love with Shawn Mendes