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SSC Sample Paper SSC CGL - Sample Paper-22

  • question_answer
    Simple interest on a certain amount is \[\frac{9}{16}\] of the principal. If the number representing the rate of interest in per cent and time in years be equal, then time, for which the principal amount is lent out, is

    A) \[5\frac{1}{2}\,yr\]                    

    B) \[6\frac{1}{2}\,yr\]

    C) \[7\,yr\]                         

    D) \[7\frac{1}{2}\,yr\]

    Correct Answer: D

    Solution :

    Let the principal \[=Rs.\,P\] \[\therefore \]      Simple interest \[=Rs.\,\frac{9P}{16}\] \[\therefore \]      \[\frac{9P}{16}=\frac{P\times r\times t}{100}\] \[\Rightarrow \]   \[{{t}^{2}}=\frac{900}{16}\] \[\Rightarrow \]   \[t=\frac{30}{4}=7\frac{1}{2}yr\]


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