Solution
The volume of a cylinder is;
[tex]V=\pi r^2h[/tex]
where r is the radius
radius = diameter/2
h is the height
here, the height is a = 1 cm
radius = 21/2 cm
Hence, the volume is
[tex]\begin{gathered} V=\pi\times(\frac{21}{2})^2\times1 \\ \\ \Rightarrow V=\frac{22}{7}\times\frac{21}{2}\times\frac{21}{2}\times1 \\ \\ \Rightarrow V=346.5\text{ cm}^3 \end{gathered}[/tex]
