document.write( "Question 1149901: Three grades A, B and C of rice were mixed in the ratio 3:4:5 the cost per kilogram of each of the grades A, B and C were sh.120.00 , sh.90.00 and sh. 60.00 respectiely. calculate
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Algebra.Com's Answer #771246 by ikleyn(52788) $\"\"$ $\"About$

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document.write( "Each kilogram of the mixture has 3 parts of grade A; 4 parts of grade B and 5 parts of grade C by mass,\r\n" );
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document.write( "in all, there are  3+4+5 = 12 parts in each kilogram\r\n" );
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document.write( "Hence, each single part is   of kilogram, and each kilogram of the mixture contains \r\n" );
document.write( " kg of grade A:   kg of grade B  and   kilogram of grade C.\r\n" );
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document.write( "So, the price of 1 kilogram of the mixture is    +  +  = 30 + 30 + 25 = 85 sh.\r\n" );
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document.write( "To get profit of 8%, the selling price should be  85*(1+0.08) = 85*1.08 = 91.80 ps for kilogram.\r\n" );
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document.write( "The selling cost of 5 kilograms is then  91.80*5 = 459 ps.\r\n" );
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