# Volume and Density

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A hollow steel shaft 12 feet long has an outside diameter of 16in. The inside diameter is 9 inches. What is the weight of this shaft if the steel weighs 0.29 lbs per cubic inch?

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#### Solution Preview

Let the length of the shaft be L and its outside and inside diameters are D and d respectively.

The volume of a cylinder is given by

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#### Solution Summary

The inner and outer diameter of a cylindrical shaft is given, the weight is calculated.

$2.49