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SSC Sample Paper Mock Test-15 SSC CGL Tear-II Paper-1

  • question_answer
    A sum of money placed at compound doubles itself in 4 yr. In how many years will it amount to four times itself?

    A) 12 yr

    B)  13 yr

    C)  8 yr     

    D)  16 yr

    Correct Answer: C

    Solution :

    Here, \[2P=P{{\left( 1+\frac{r}{100} \right)}^{4}}\]                   ?(i) \[4P=P{{\left( 1+\frac{r}{100} \right)}^{t}}\]                 ?(ii) On solving Eqs. (i) and (ii), we get \[t=8\]yr


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