Copper Ring $($including proper units$)$

$\backslash$table$[[,$Outer Diameter,Inner Diameter,Thickness,Mass$],[$First Measurement,$12$ cm$,10\mathrm{.}2$ cm$,0\mathrm{.}198$ cm$,57\mathrm{.}3$ g$],[$Second Measurement,$12\mathrm{.}3$ cm$,10\mathrm{.}6$ cm$,0\mathrm{.}199$ cm$,57\mathrm{.}9$ g$],[$Third Measurement,$12\mathrm{.}2$ cm$,10\mathrm{.}4$ cm$,0\mathrm{.}192$ cm$,57\mathrm{.}0$ g$],[$Average Value,,,,$]]$

Calculations:

Volume:

Density: