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Q: A certain sum (in `) is invested at y% per annum for 3½ years. Had it been invested at (y + 4)% per annum at simple interest, it would have fetched `4,452 more as interest. What is the sum?
  • A. `31,800
  • B. `42,800
  • C. `30,400
  • D. `42,400
Correct Answer: Option A -
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Explanations:

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