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    Question

    The simple interest on a sum of money is 9/20 of the

    sum. If the number of years is numerically half the rate per annum, then find the rate percent per annum.
    A 5.6% Correct Answer Incorrect Answer
    B 8% Correct Answer Incorrect Answer
    C 6.9% Correct Answer Incorrect Answer
    D 9.5% Correct Answer Incorrect Answer

    Solution

    Let P = 20 units and Simple Interest = 9 units T = R/2 SI = (P × R × T)/100 => 9 = (20 × R × R)/(100 × 2) => R = 9.5%

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