8th Class Mathematics Percentage Question Bank Percentage, Profit and Loss

  • question_answer If 60% of K is 30 less than 75% of K, then what is the value of K?

    A)  500                             

    B)  300     

    C)  400                             

    D)  200

    Correct Answer: D

    Solution :

    (d): \[\frac{60}{100}\times K=\frac{75}{100}\times K-30\] \[\Rightarrow 30=\left( \frac{75-60}{100} \right)\times K\] \[\Rightarrow \frac{15K}{100}=30\Rightarrow K=200.\]

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