This stainless-steel fitting

measures 3.9 cm long. It

has an inner diameter of

2.7 cm and an outer

diameter of 3.6 cm. If the

density of stainless-steel

is 8 g/cm3, what is the

mass of the fitting?

Subtract the volume of the inside diameter from the volume of the outside diameter and then multiply that by the density.

Volume of outside:

PI x 1.8^2 x 3.9 = 39.67704 cubic cm

Volume of inside:

PI x 1.35^2 x 3.9 = 22.318335 cubic cm

Difference: 39.67704 - 22.318335 = 17.358705 cubic cm.

Mass = 17.358705 x 8 = 138.86964 grams. Round the answer as needed.