document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1115859>Question 1115859</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A plant food is to be made from three chemicals. The combined amounts of the first two  chemicals must be 70&#8203;% of the resulting mix. The second and third chemicals must be in the ratio of 4 to 3 by weight. How much of each chemical is needed to make 700 kg of the plant&#8203; food? </SPAN>\n" );
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document.write( "The combined weight of the first two is 70% of the total weight, so the weight of the third chemical is 30% of the total.<br><BR>\n" );
document.write( "If the ratio of the second and third chemicals is 4:3 and the third chemical is 30% of the total weight, then the second chemical is 40% of the total weight.<br><BR>\n" );
document.write( "If the second chemical is 40% of the total weight and the third is 30% of the total, then the first is 30% of the total.<br><BR>\n" );
document.write( "So 30% first chemical, 40% second, and 30% third.  With a total weight of 700 kg, you need<BR>\n" );
document.write( "210 kg of first<BR>\n" );
document.write( "280 kg is second<BR>\n" );
document.write( "210 kg of third </SPAN>\n" );
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