Question 1161738
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The cross section is a hexagon with side length 2 with a circle of radius 3/4 inches cut out.<br>
Area of hexagon: {{{(3s^2sqrt(3))/2 = 6sqrt(3)}}}
Area of circle: {{{(pi)r^2 = (pi)(9/16)}}}<br>
Cross-sectional area: {{{6sqrt(3)-(9/16)(pi)}}}<br>
volume: cross-sectional area, times length (15 inches)<br>
weight: volume, times pounds per cubic inch<br>
Use a calculator....<br>