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SSC Sample Paper Mock Test-20 SSC CGL Tear-II Paper-1

  • question_answer
    A sample of 50 L of glycerin is found to be adulterated to the extent of 20%. How much pure glycerin should be added to it so as to bring down the percentage of impurity to 5%?

    A) 155 L

    B)  150 L

    C)  150.4 L

    D)  149 L

    Correct Answer: B

    Solution :

    Glycerine in mixture = 40 L Water = 10 L Let x litres of pure glycerine is mixed with the mixture \[\therefore \]      \[\frac{40+x}{50+x}=\frac{95}{100}=\frac{19}{20}\] \[\Rightarrow \]   \[800+20x=950+19x\] \[\Rightarrow \]   \[x=950-800=150\,\,\text{L}\]


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