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      Question

      Rs. 1800 earns a simple interest of Rs. 4050 when

      invested at 15% per annum for (x + 3) years. What will be the total amount received if the same amount is invested at 7.5% p.a. for '2x' years?
      A Rs.3340 Correct Answer Incorrect Answer
      B Rs.7040 Correct Answer Incorrect Answer
      C Rs.5000 Correct Answer Incorrect Answer
      D Rs.5040 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ,

      {1800 × 15 × (x + 3)}/100 = 4050 Or, 270(x + 3) = 4050 Or, x + 3 = 15 Or, x = 12 Therefore, 2x = 24 years Required amount received = {(1800 × 7.5 × 24)/100} + 1800 = Rs.5040

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