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SSC Sample Paper SSC CGL - Sample Paper-28

  • question_answer
    At what rate per cent of simple interest will a sum of money double itself in 12 yr?

    A) \[8\frac{1}{3}%\]          

    B) \[8\frac{1}{2}%\]

    C) \[8\frac{1}{4}%\]                      

    D) \[9\frac{1}{2}%\]

    Correct Answer: A

    Solution :

    Let the sum \[=Rs.\,P\] \[\therefore \] Amount \[=Rs.\,2P\] \[\Rightarrow \]   \[SI=Rs.\,P\] \[\therefore \]    \[P=\frac{P\times r\times 12}{100}\] \[\Rightarrow \]   \[r=\frac{100}{12}=8\frac{1}{3}%\]     


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