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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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