It is given that
[tex]\begin{gathered} d=20\text{ so r=}\frac{20}{2}=10 \\ h=20 \end{gathered}[/tex]Volume of cylinder is given by
[tex]V=\pi\times r^2\times h^{}[/tex]So volume of the given cylinder will be
[tex]\begin{gathered} V=3.14\times16\times20 \\ =1004.8 \end{gathered}[/tex]So volume of cylinder is 1004.80 cubic ft.
