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      Question

      A certain sum of money becomes 8000 in 6 years and Rs.

      9240 in 10 years at any certain rate of simple interest. Find the principal amount.
      A Rs. 6140 Correct Answer Incorrect Answer
      B Rs. 5100 Correct Answer Incorrect Answer
      C Rs. 6120 Correct Answer Incorrect Answer
      D Rs. 6130 Correct Answer Incorrect Answer

      Solution

      Simple interest for 4 years = 9240 โ€“ 8000 = Rs. 1240 Simple interest for 1 year = 1240/4 = Rs. 310 Simple interest for 6 years = 310 ร— 6 = Rs. 1860 So, required principal amount = 8000 โ€“ 1860 = Rs. 6140

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