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SSC Sample Paper SSC (Group-C) Sample Test Paper-7

  • question_answer
    At some rate of simple interest, A lent Rs. 6,000 to B for 2 years and Rs.1,500 to C for 4 years and received Rs.9,00 as interest from both of them together. The rate of interest per annum was

    A)  \[5%\]              

    B)  \[6%\]

    C)  \[8%\]            

    D)       \[10%\]

    Correct Answer: A

    Solution :

     If rate of interest be R% p.a. then. \[SI=\frac{\text{Principal}\times Time\times Rate}{100}\] \[\therefore \]  \[\frac{6000\times 2\times R}{100}+\frac{1500\times 4\times R}{100}=900\] \[\Rightarrow \]            \[120R+60R=900\] \[\Rightarrow \]            \[180R=900\] \[\Rightarrow \]            \[R=\frac{900}{180}=5%\]


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