The mass of a solid cylinder shown is (250±1) grams, with radius (r =10.5±0.01) mm and length of (l =20.5±0.01) mm. ( Note: the volume of the cylinder is V = π r2h)

a. Find the density ρ of the cylinder in (g/cm3) and in (Kg/m3). Find the uncertainty in density ρ of the cylinder in (g/cm3 )