Question 1044232
The inside diameter is  {{{(4-2*(d/10))cm}}}, or the inner radius is {{{2-d/10}}} centimeters.


Volume of the hollow cylinder is  {{{3*pi*(2^2-(2-d/10)^2)*cm^3}}}.
-
{{{3pi(4-4+d/5+d/5+d^2/100)}}}
{{{3(pi)(2d/5+d^2/100)}}}


Mass will use density {{{2.8g/cm^3}}} as a factor.
-
{{{highlight(2.8*3(pi)(2d/5+d^2/100))}}}
Simplify in whatever way you prefer or need.