Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-27

  • question_answer
    Find compound interest on Rs. 10000 at 10% per annum for 2 yr and 3 months, compounded annually.

    A)  Rs. 2303.50     

    B)  Rs. 2402.50

    C)  Rs. 2002.50     

    D)  Rs. 5020.50

    Correct Answer: B

    Solution :

    P = Rs. 10000, R=10% per annum\[=2\frac{1}{4}\]yr Amount\[=P\times {{\left[ 1+\frac{R}{100} \right]}^{2}}\times \left[ 1+\frac{\frac{1}{4}R}{100} \right]\] \[=Rs.\,\,\left\{ 10000\times {{\left[ 1+\frac{10}{100} \right]}^{2}}\times \left[ 1+\frac{1}{4}\times \frac{10}{100} \right] \right\}\] \[=\,\,Rs.\,\,\left[ 10000\times \frac{11}{10}\times \frac{11}{10}\times \frac{41}{40} \right]\] = Rs. 12402. 50 CI = Rs. (12402.50 - 10000) = Rs. 2402.50


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