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SSC Sample Paper SSC CGL - Sample Paper-5

  • question_answer
    40 L of a mixture of milk and water contains 10% of water, the water to be added, to make the water content 20% in the new mixture is

    A)  6 L                             

    B)  6.5 L

    C)  5.5 L               

    D)  5 L

    Correct Answer: D

    Solution :

    Water content in 40 L of mixture \[=40\times \frac{10}{100}=4\,L\] \[\therefore \] Milk content \[=40-4=36\,L\] Let x L of water is mixed. \[\therefore \]      \[\frac{4+x}{40+x}=\frac{20}{100}\] \[\Rightarrow \]   \[\frac{4+x}{40+x}=\frac{1}{5}\]         \[\Rightarrow \]   \[20+5x=40+x\] \[\Rightarrow \]   \[4x=20\] \[\Rightarrow \]   \[x=5\,L\]


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