document.write( "Question 601831: a pipe of thicknes 1cm has an external diameter of 10cm.find the volume of 20m of pipe. \n" ); document.write( "
Algebra.Com's Answer #380025 by Alan3354(69443)\"\" \"About 
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a pipe of thicknes 1cm has an external diameter of 10cm.find the volume of 20m of pipe.
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\n" ); document.write( "The ID (inside diameter) is 10 - 2 = 8 cm
\n" ); document.write( "r = 4 cm
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\n" ); document.write( "\"Vol+=+pi%2Ar%5E2%2Ah\"
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