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      Question

      X invested Rs. x at 7% per annum simple interest for 5

      years and Y invested Rs. (x + 900) at 9% per annum simple interest for 1 year. If the total interest is Rs. 378, find x.
      A Rs.500 Correct Answer Incorrect Answer
      B Rs.550 Correct Answer Incorrect Answer
      C Rs.675 Correct Answer Incorrect Answer
      D Rs.525 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ:
      (x ร— 7 ร— 5)/100 + {(x + 900) ร— 9 ร— 1}/100 = 378
      35x + 9x + 8100 = 37800
      44x = 29700
      x = Rs. 675

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