1. There are two alloys P and Q made up of silver, copper and aluminium. Alloy P contains 45% silver and rest aluminum. Alloy Q contains 30% silver, 35% copper and rest aluminium. Alloys P and Q are mixed in the ratio of 1 : 4 . 5. The approximate percentages of silver and copper in the newly formed alloy is:





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  • By: anil on 05 May 2019 02.39 am
    Composition of alloy P Silver:Copper:Aluminium = 45:0:55 Composition of alloy Q Silver:Copper:Aluminium = 30:35:35 They are mixed in ratio of 1: 4.5 Let us consider alloy P is taken 200 grams and alloy Q is taken 900 grams. Then for alloy P :- Silver:Copper:Aluminium = 90:0:110 For alloy Q: Silver:Copper:Aluminium = 270:315:315 Total weight of P and Q combined is 1100 grams. When P and Q are mixed, the new combined ratio of  Silver:Copper:Aluminium = 360:315:425
    Percentage of Silver in mixture = $$frac{360}{1100}$$ x 100 $$cong$$ 33% Percentage of Copper in mixture = $$frac{315}{1100}$$ x 100 $$cong$$ 29%
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