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      Question

      A sum of Rs. x is invested at simple interest at 9% per

      annum for 5 years. If another sum of Rs. (x + 200) is also invested at the same rate for the same time, then the combined simple interest from both investments comes out to be Rs. 990. Find x.
      A 1750 Correct Answer Incorrect Answer
      B 1620 Correct Answer Incorrect Answer
      C 2750 Correct Answer Incorrect Answer
      D 1000 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, SI = PNR/100 SI = x * 9 * 5/100 SI = 0.45x SI = (x + 200) * 9 * 5/100 SI = 0.45x + 90 ┬а (0.45x + 0.45x + 90) = 990 0.9x = 990 - 90 0.9x = 900 x = 900 / 0.9 x = 1000

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