# Elementary education

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A napkin ring is being made of cast silver. It has the shape of a cylinder 1.25 inches high, with a cylindrical hole 2 inch in diameter and a thickness of 1/16 inch. How many ounces of silver are needed? [silver weighs 6 ounces per cubic inch]

• Elementary education -

Yes math

• Elementary education -

volume = 1.25 (pi)(1.0625^2-1)

= .5062 in^3

mass = 6 * .5062 = 3.04 oz

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