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      Question

      A certain amount becomes double in 8 years at r% simple

      interest. Find the rate of interest.
      A 10.5 Correct Answer Incorrect Answer
      B 48 Correct Answer Incorrect Answer
      C 25 Correct Answer Incorrect Answer
      D 12.5 Correct Answer Incorrect Answer

      Solution

      Let the amount be Rs. x According to the question, (x Γ— r Γ— 8)/100 = 2x – x Or, r = 12.5

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