document.write( "Question 985186: A lead pencil whose ends are regular hexagons was cut from a cylindrical piece of wood with the least waste.If the original piece was 8 in.long and 1\4in.in diameter.Find the volume of the pencil?\r
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Algebra.Com's Answer #606022 by srinivas.g(540)![]() ![]() You can put this solution on YOUR website! A hexagon may be viewed as 6 equilateral triangles with a common apex. Given \"the least waste\", the side of each of these triangles is s = 1/4 in. \n" ); document.write( "So the base of 1 triangle is b = 1/4 in; the height for an equilateral triangle can be shown to be h = b√3/2, so the total area of the pencil is \n" ); document.write( "A = 6(½bh) = (6)½(1/4\")(1/4\")√3/2 = 3√3/32 in² \n" ); document.write( "Then V = (3√3/32 in²)(8 in) = 3√3/4 in³ ≈ 1.3 in³ \n" ); document.write( " |