Answer:
[tex]\large\boxed{V=324\pi\ in^3\approx1017.36\ in^3}[/tex]
Step-by-step explanation:
The formula of a volume of a cone:
[tex]V=\dfrac{1}{3}\pi r^2H[/tex]
r - radius
H - height
We have r = 9in and H = 12in. Substitute:
[tex]V=\dfrac{1}{3\!\!\!\!\diagup_1}\pi(9^2)(12\!\!\!\!\!\diagup^4)=\pi(81)(4)=324\pi\ in^3\\\\\pi\approx3.14\\\\V\approx(324)(3.14)=1017.36\ in^3[/tex]
