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SSC Sample Paper SSC CGL - Sample Paper-29

  • question_answer
    In how many years a certain sum doubles itself at 4% per annum simple interest?

    A) 5 yr                              

    B) 10 yr

    C) 20 yr                            

    D) 25 yr

    Correct Answer: D

    Solution :

    Let the principal\[=Rs.\,P\] \[\therefore \] Amount, \[A=Rs.\,2P\] \[\Rightarrow \] Simple interest \[=Rs.\,P\] and       \[r=4%\] \[\therefore \]      \[P=\frac{P\times 14\times t}{100}\] \[\Rightarrow \] \[\frac{100}{4}=t\] \[\Rightarrow \] \[t=25\,yr\]


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