Question
Alloy A contains iron and copper in ration 4:5. Alloy B
contains iron and copper in ratio 3 : 4. If 45kg of alloy A and 63 kg of alloy B are mixed, then what is the final ratio of copper and iron?Solution
           Iron     Copper In contains A                4:        5                     9=45                                    20       25 In contains B                3:        4                     7=63                                    27       36  Ratio                           47:      61 Ratio of copper and iron =61:47.
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