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      Question

      The time required for a sum of money to amount to five

      times itself at 16% simple interest p.a. will be
      A 25 years Correct Answer Incorrect Answer
      B 20 years Correct Answer Incorrect Answer
      C 15 years Correct Answer Incorrect Answer
      D 18 years Correct Answer Incorrect Answer

      Solution

      Let Principal = Rs. 100 then Amount = Rs. 500 then Simple Interest = 500-100=400┬а & we know that , Simple Interest = (P ├ЧR ├ЧT)/100 So 400 = (100 ├Ч16 ├ЧT)/100 T = 400/16 = 25 years.

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