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8th Class Mathematics Comparing Quantities Question Bank Comparing Quantities

  • question_answer
    The value of an article which was purchased 2 years ago, depreciates at 12% per annum. If its present value is Rs.9680, what is the price at which it was purchased?

    A)  Rs.10000                            

    B)                         Rs.12500            

    C)                         Rs.14575                            

    D)                         Rs.16250

    Correct Answer: B

    Solution :

    \[A=P{{\left( 1-\frac{R}{100} \right)}^{n}}\] \[\Rightarrow \] \[Rs.\,\,9680=P{{\left( 1-\frac{12}{100} \right)}^{2}}\] \[\Rightarrow \] \[P=Rs.\,\,9680\times \frac{25}{22}\times \frac{25}{22}\]                 \[=Rs.\,\,12500\]


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