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      Question

      A man deposited Rs. ‘x + 900’ at 12% per annum

      simple interest and earned Rs. 528 as interest after 2 years. Find the interest earned by him if he deposited Rs. 2x at 10% per annum for 2 years at compound interest. 
      A Rs. 609 Correct Answer Incorrect Answer
      B Rs. 546 Correct Answer Incorrect Answer
      C Rs. 798 Correct Answer Incorrect Answer
      D Rs. 504 Correct Answer Incorrect Answer
      E Rs. 420 Correct Answer Incorrect Answer

      Solution

      So, {(x + 900) × 0.12 × 2 = 528 0.24x + 216 = 528 x = 312/0.24 = 1900 So, required interest earned = 2 × 1900 × 0.21 = Rs. 546

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