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      Question

      A certain amount becomes four times itself when invested

      at r% per annum simple interest for 12 years. What is the value of r?
      A 25% Correct Answer Incorrect Answer
      B 40% Correct Answer Incorrect Answer
      C 60% Correct Answer Incorrect Answer
      D 32% Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the amount invested be Rs. x

      According to the question,

      Image
      Therefore, r = 25%

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