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Railways Sample Paper RRB (Group D) Sample Test Paper-14

  • question_answer
    The compound interest on  Rs. 12000 for 9 months at 20% per annum, interest being compounded quarterly is:

    A)  Rs. 1750          

    B)  Rs. 1891.10

    C)  Rs. 2136.40     

    D)  Rs. 2089.70

    Correct Answer: B

    Solution :

    [b] P=Rs. 12000; R=20% per annum=5% per quarter T=9 months=3 quarters \[so,\,\,A=12000\,\,{{\left( 1+\frac{5}{10} \right)}^{3}}=12000\times 1.05\times 1.05\times 1.05\]\[=Rs.\,\,13891.1\] =Rs. 13891.1 .\[So,\,\,CI=13891.10-\,12000=\text{Rs}\text{.}\,\,1891.10\]


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