document.write( "Question 117415: Pls help!!! : A coil of wire has a mass of 1.2 kg. The diameter of the wire is 2mm. 1cm^3 of the wire weighs 6.8g. Find the length of the wire and correct to the nearest metre. \n" ); document.write( "
Algebra.Com's Answer #85409 by edjones(8007)\"\" \"About 
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x/1200=1/6.8 Proportion. Keep everything in g.
\n" ); document.write( "1200x/1200=1200/6.8
\n" ); document.write( "x=176.47cm^3
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\n" ); document.write( "pi*r^2*L=volume
\n" ); document.write( "pi*(.2/2)^2*L=176.47 Keep everything in cm.
\n" ); document.write( ".1^2*pi*L=176.47
\n" ); document.write( ".01pi*L=176.47
\n" ); document.write( ".01pi*L/.01pi=176.47/.01pi
\n" ); document.write( "L=5,617.21 cm
\n" ); document.write( "=56 m
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