document.write( "Question 945826: silver ,copper ,lead and zinc are melted together in a ratio of 2:6:7:8 and formed into a mass . one kg of zinc cost Rs 15, a kg of lead 20% more than that of zinc,a kg of silver 20 times that of lead . if the quantity melted was sold at Rs.60 per kg,find the price of copper in rupees per kilogram.
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Algebra.Com's Answer #577073 by ankor@dixie-net.com(22740)\"\" \"About 
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silver ,copper ,lead and zinc are melted together in a ratio of 2:6:7:8 and formed into a mass .
\n" ); document.write( " one kg of zinc cost Rs 15,
\n" ); document.write( " a kg of lead 20% more than that of zinc,
\n" ); document.write( " a kg of silver 20 times that of lead .
\n" ); document.write( " if the quantity melted was sold at Rs.60 per kg, find the price of copper in rupees per kilogram.
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\n" ); document.write( "let's use the sum of the ratio values as the resulting total 23 kg
\n" ); document.write( "then
\n" ); document.write( "2 km, amt of silver
\n" ); document.write( "6 kg, amt of copper
\n" ); document.write( "7 kg, amt of lead
\n" ); document.write( "8 kg, amt of zinc
\n" ); document.write( ":
\n" ); document.write( "let c = cost of copper per kg
\n" ); document.write( "Given: Zinc = $15 per kg
\n" ); document.write( "lead: 1.2(15) = $18 per kg
\n" ); document.write( "silver; 20(18) = $360 per kg
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\n" ); document.write( "The mixture equation
\n" ); document.write( "360(2) + 6c + 18(7) + 15(8) = 60(23)
\n" ); document.write( "720 + 6c + 126 + 120 = 1380
\n" ); document.write( "6c + 966 = 1380
\n" ); document.write( "6c = 1380 - 966
\n" ); document.write( "6c = 414
\n" ); document.write( "c = 414/6
\n" ); document.write( "c = $69 is the cost per kg for copper \n" ); document.write( "
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