A cylindrical tube open at both ends is made of metal. The internal diameter of the tube is $11.2 \;cm$ and its length is $21\;cm$ . The metal every where is $0.4\;cm$ thick. Calculate the volume of the metal correct to 1 place of decimal

Question

$\begin{array}{1 1} 304\;cm^2 \\ 305\;cm^2 \\ 306.2\;cm^2 \\ 340 \end{array} $