document.write( "Question 1050239: How many feet of piping can be made from 5 cubic feet of iron if the outer diameter of the pipe is 16 inches and the inner diameter is 12 inches? \n" ); document.write( "

Algebra.Com's Answer #665821 by ikleyn(52803) $\"\"$ $\"About$

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\n" ); document.write( "How many feet of piping can be made from 5 cubic feet of iron if the outer diameter of the pipe is 16 inches and the inner diameter is 12 inches?
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document.write( "Your guiding equation is\r\n" );
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document.write( "5 = .   (1)\r\n" );
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document.write( " is the volume of the cylinder of the radius 8 =  inches and the length of L feet.\r\n" );
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document.write( " is the volume of the cylinder of the radius 6 =  inches and the length of L feet.\r\n" );
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document.write( "The difference is the volume of the pipe, which is a hollow cylinder.\r\n" );
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document.write( "The number \"5\" in the left side of the equation (1) is the given volume of the iron.\r\n" );
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document.write( "Simplify (1):\r\n" );
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document.write( "5 =  = ,\r\n" );
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document.write( "hence\r\n" );
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document.write( "L = .\r\n" );
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document.write( "Use your calculator.\r\n" );
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