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Railways Sample Paper RRB (Group D) Sample Test Paper-13

  • question_answer
    The difference between the compound interest and simple interest for the amount Rs. 5, 000 in 2 years is Rs. 32. The rate of interest is

    A)  5%                  

    B)  8%

    C)  10%                

    D)  12%

    Correct Answer: B

    Solution :

    [b] Difference of 2 years \[P{{\left( \frac{r}{100} \right)}^{2}}\] \[\Rightarrow \,\,\,32=\frac{500\times {{r}^{2}}}{10000}\] \[\Rightarrow \,\,\,{{r}^{2}}=\frac{32\times 10000}{5000}=64\] \[\Rightarrow \,\,\,r=\sqrt{64}=8%\]


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