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?
    A 61 : 47 Correct Answer Incorrect Answer
    B 64 : 47 Correct Answer Incorrect Answer
    C 59 : 45 Correct Answer Incorrect Answer
    D 57 : 41 Correct Answer Incorrect Answer

    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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