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SSC Quantitative Aptitude Simple Interest Question Bank Simple and Compound Interest (II)

  • question_answer
    On a certain sum, the simple interest at the end of \[6\frac{1}{4}yr\]becomes \[\frac{3}{8}\] of the sum. The rate of interest is

    A) 5%

    B) 6%

    C) 7%

    D) 8%

    Correct Answer: B

    Solution :

    [b] Let\[P=\text{Rs}.P,\]\[SI=Rs.\frac{3}{8}P,\] \[t=6\frac{1}{4}yr=\frac{25}{4}yr\] \[\therefore \]      \[r=\frac{SI\times 100}{P\times t}\] \[=\frac{3\,P}{8}\times \frac{100\times 4}{P\times 25}=6%\]


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