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      Question

      A certain sum when invested at compound interest of 6% p.a.

      amounts to Rs. 5618.40 in 2 years. Find the amount received when the same sum is invested at 18% p.a. simple interest for 3 years.
      A Rs 7300 Correct Answer Incorrect Answer
      B Rs 7500 Correct Answer Incorrect Answer
      C Rs 7700 Correct Answer Incorrect Answer
      D Rs 7900 Correct Answer Incorrect Answer
      E Rs 8100 Correct Answer Incorrect Answer

      Solution

      Let the sum invested at compound interest be Rs. x
      According to the question,
      x(1 + 6/100) 2 = 5618.4
      or, x = 5618.4/1.1236 = Rs. 5000
      Required amount received = {(5000 Γ— 18 Γ— 3)/100} + 5000 = Rs. 7700

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