document.write( "Question 1207467: Calculate the approximate mass in kg of a 2-m length of cylindrical clay pipe of external and internal diameters 15 cm and 12 cm. The density of clay is 1.3 g/cm³ \n" ); document.write( "
Algebra.Com's Answer #845345 by ikleyn(52797)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Find the volume of the clay material and multiply it by the density of clay.\r
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\n" ); document.write( "\n" ); document.write( "To find the volume of the clay material,  from the volume of the greater cylinder subtract the volume of the smaller cylinder.\r
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\n" ); document.write( "\n" ); document.write( "Also,  the density of clay is  (according to all available sources)  from  2 g/cm^3  to  3 g/cm^3.\r
\n" ); document.write( "\n" ); document.write( "The most acceptable value for clay density in engineering practice is about  2.6 g/cm^3.\r
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\n" ); document.write( "\n" ); document.write( "Surely,  it heavily depends on the fact if the clay is wet or dried,
\n" ); document.write( "but the value of  1.3 g/cm^3  for clay density looks far out of common sense.\r
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