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      Question

      What will be the ratio of simple interest earned on

      certain amount at the same rate of interest for 3 years and that for 9 years?
      A 1:3 Correct Answer Incorrect Answer
      B 3:4 Correct Answer Incorrect Answer
      C 2:5 Correct Answer Incorrect Answer
      D 3:7 Correct Answer Incorrect Answer

      Solution

      Let the principal be P and rate of interest be R%. Required ratio = [(Pร—Rร—3)/100)]/[(Pร—Rร—9)/100)] = 3PR/9PR = 1:3

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