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      Question

      Aman invested Rs. ‘x’ at 9% p.a. and Arjun invested

      Rs. (x + 400) at 7% p.a. If after 4 years the total simple interest is Rs. 1800, find the value of ‘x’.
      A Rs 2500 Correct Answer Incorrect Answer
      B Rs 2314.29 Correct Answer Incorrect Answer
      C Rs 3644.44 Correct Answer Incorrect Answer
      D Rs 2637.50 Correct Answer Incorrect Answer

      Solution

      According to the question,
      (x × 0.09 × 4) + {(x + 400) × 0.07 × 4} = 1800 Or, 0.36x + 0.28x + 112 = 1800 Or, 0.64x = 1688 Or, x = 1688 / 0.64 = 2637.5 Or, x = Rs. 2637.50

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