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      Question

      Rahul borrowed Rs. 30,000 from his friend at compound

      interest of 10% p.a., compounding annually. He added Rs. 'P' to this money and lent the total sum to Arjun at simple interest of 10% p.a. for 3 years. If total profit earned by Rahul at the end of 3 years is Rs. 1,950, then find the value of 'P'.
      A 6000 Correct Answer Incorrect Answer
      B 7200 Correct Answer Incorrect Answer
      C 8400 Correct Answer Incorrect Answer
      D 9600 Correct Answer Incorrect Answer
      E 11000 Correct Answer Incorrect Answer

      Solution

      Interest to be paid by Rahul = 30000 Γ— {(1.1)Β³ βˆ’ 1} = Rs. 9,930 So, interest earned by Rahul = 9930 + 1950 = Rs. 11,880 So, 11880 = {(P + 30000) Γ— 10 Γ— 3} Γ· 100 Or, 118800 = 3P + 90000 Or, 3P = 28800 So, P = 9600

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