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CLAT Sample Paper CLAT Sample Paper-12

  • question_answer
    4 kg of a metal contains \[\frac{1}{5}\] copper and rest is  zinc Another 5 kg of metal contains \[\frac{1}{6}\] copper and rest is zinc The ratio of copper and zinc into the mixture of these two metals is

    A)  49 : 221         

    B)  39 : 231          

    C)         94 : 181        

    D)                     None of these

    Correct Answer: A

    Solution :

    Copper in \[4\,kg\,=\frac{4}{5}\,kg\] and zinc in \[4\,kg\,=4\times \frac{4}{5}=\frac{16}{5}\,kg\] Copper in 5 \[kg\,=\,5\times \frac{1}{6}=\frac{5}{6}\,kg\] and  zinc in \[5\,kg\,=5\times \frac{5}{6}=\frac{25}{6}\,kg\]  Therefore, copper m mixture \[=\frac{4}{5}+\frac{5}{6}=\frac{49}{30}\,kg\] and zmc in the mixture \[=\frac{16}{5}+\frac{25}{6}=\frac{221}{30}\,kg\] Therefore, the required ratio = 49: 221


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