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8th Class Mathematics Related to Competitive Exam Question Bank Arithmetic

  • question_answer
    Gopi borrowed Rs.1800 at 12% per annum for 2 years and Krishna borrowed Rs.1200 at 18% per annum for 3 years. Then the ratio of interests paid by them is?

    A) 1:2                                    

    B) 2:3

    C) 3:1                                    

    D) 2:1

    Correct Answer: B

    Solution :

    Gopi                                  Krishna P = Rs.1800                      P = Rs.1200 R = 12%                                       R = 18% T = 2 years                        T = 3 years \[6\frac{1}{4}%\]                         \[{{I}_{2}}=\frac{PTR}{100}\] \[=\frac{1800\times 2\times 12}{100}\]               \[=\frac{1200\times 3\times 18}{100}\] \[=Rs.\,432\,\]                               \[=Rs.\,648\] \[{{I}_{1}}:{{I}_{2}}=432:\,\,648=2:3.\]


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