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      Question

      A sum of money doubles itself at compound interest in 15

      years. In how many years will it, become eight times?
      A 15 years Correct Answer Incorrect Answer
      B 30 years Correct Answer Incorrect Answer
      C 40 years Correct Answer Incorrect Answer
      D 45 years Correct Answer Incorrect Answer

      Solution

      ATQ-15years =2times x    =8times=23times  x=15×3=45years.

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