SOLUTION: A hexagonal steel bar has the following description: 15 in. length. A circular hole in middle; 1.5 in. in diameter. (extends length of bar). Side of hexagon; 2 in. Stee

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: A hexagonal steel bar has the following description: 15 in. length. A circular hole in middle; 1.5 in. in diameter. (extends length of bar). Side of hexagon; 2 in. Stee      Log On

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Question 1161738: A hexagonal steel bar has the following description:
15 in. length.
A circular hole in middle; 1.5 in. in diameter. (extends length of bar).
Side of hexagon; 2 in.
Steel weighs .283 lbs. / cu. in.
Determine volume and weight.
Not sure how to solve.

Answer by greenestamps(13203) About Me  (Show Source):
You can put this solution on YOUR website!


The cross section is a hexagon with side length 2 with a circle of radius 3/4 inches cut out.

Area of hexagon: %283s%5E2sqrt%283%29%29%2F2+=+6sqrt%283%29
Area of circle: %28pi%29r%5E2+=+%28pi%29%289%2F16%29

Cross-sectional area: 6sqrt%283%29-%289%2F16%29%28pi%29

volume: cross-sectional area, times length (15 inches)

weight: volume, times pounds per cubic inch

Use a calculator....