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8th Class Mathematics Related to Competitive Exam Question Bank Arithmetic

  • question_answer
    The CI on a certain sum for 2 years at 10% per annum is Rs.525. The SI on the same sum for double the time at half the rate per cent per annum is                                 

    A) Rs.400                  

    B) Rs.500               

    C) Rs.600                  

    D) Rs.800    

    Correct Answer: B

    Solution :

    \[\frac{a}{b}=\frac{b}{c}\] \[\Rightarrow \] \[{{b}^{2}}=ac\] \[\Rightarrow \] \[b=\sqrt{ac}\]       


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