document.write( "Question 1206289: a cylindrical drain pipe has internal and external diameter of 6.4cm and 7.6cm, respectively
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Algebra.Com's Answer #843615 by ikleyn(52817) $\"\"$ $\"About$

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document.write( "You calculate first the area of the cross section\r\n" );
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document.write( "    area =  =  = 13.194678 cm^2.\r\n" );
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document.write( "Then you calculate the volume of the 1 meter metallic pipe by multiplying the cross area by 100 cm\r\n" );
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document.write( "    volume = 100*area = 100*13.194678 = 1319.4678 cm^3.\r\n" );
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document.write( "Then you multiply the volume by the density and get the ANSWER\r\n" );
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document.write( "    the mass per meter = 8*1319.4678 = 10555.7 gram  = 10.556 kg (rounded).\r\n" );
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