Question 949579
Model the coating to be like a cylinder with inside diameter 55 mm, outside diameter 55+8=63 mm, length 5 m.


Volume of lead, {{{v=5*pi*(0.063/2)^2-5*pi*(0.055/2)^2}}}
{{{(5pi/4)(0.063^2-0.055^2)}}}
{{{(5pi/4)(0.000944)}}}
{{{highlight(0.00118pi)}}} cubic meters.


The way you showed your lead's density looks strange, indicating to be 1174.2 kilograms per cubic meter, which may be the wrong value.  You decide what you really want to use for the lead's density.  Convert your volume into kilograms.