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    Question

    A certain sum becomes 3.5 times itself in 10 years at

    simple interest. Find the rate of interest.
    A 25% Correct Answer Incorrect Answer
    B 45% Correct Answer Incorrect Answer
    C 18% Correct Answer Incorrect Answer
    D 10% Correct Answer Incorrect Answer

    Solution

    Let the sum be Rs. x (x ├Ч r ├Ч 10) / 100 = 3.5x тАУ x тЗТ 10xr / 100 = 2.5x тЗТ r = 25 Rate of interest = 25% per annum

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