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8th Class Mathematics Related to Competitive Exam Question Bank Arithmetic

  • question_answer
    The compound interest on Rs.8,000 at 20% per annum for 9 months compounded quarterly is

    A) 1,260                    

    B) 1,261

    C) 1,271                    

    D) 1,281

    Correct Answer: B

    Solution :

    Here, P = Rs. 8000, R = 20% per annum, n= 9 months \[T=2years,P=?\] \[I=\frac{PTR}{100}\] \[P=\frac{100\times I}{TR}=\frac{100\times 600}{2\times 6}=Rs.5000.\] \[\frac{P\times (R+2)\times 4}{100}-\frac{P\times 4\times R}{100}=56\]\[\frac{4P\times 2}{100}=56\]


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