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SSC Sample Paper SSC CGL - Sample Paper-30

  • question_answer
    In an alloy, the ratio of copper and zinc is 5: 2. If 1.250 kg of zinc is mixed in 17 kg 500 g of alloy, then the ratio of copper and zinc will be

    A) 2 : 1                 

    B) 2 : 3

    C) 3 : 2                             

    D) 1 : 2

    Correct Answer: A

    Solution :

    Ratio of Copper and Zinc \[=5:2\] Total weight of alloy \[=17500\,g\] \[\therefore \] Weight of Copper \[=\frac{5}{7}\times 17500=12500\,g\] \[\Rightarrow \] Weight of Zinc \[=17500-12500\]    \[=5000\,g\] 1250 g of Zinc is mixed with the alloy. \[\therefore \] Total weight of Zinc \[=5000+1250=6250\,g\] \[\therefore \] New ratio \[=12500:6250\]                     \[=2:1\]    


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