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      Question

      A sum becomes 9200 in 3 years and 10400 in 5 years at

      simple interest. Find the principal.
      A 6520 Correct Answer Incorrect Answer
      B 3200 Correct Answer Incorrect Answer
      C 4400 Correct Answer Incorrect Answer
      D 7400 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, Difference in amounts for 2 years = 10400 − 9200 = 1200 SI per year = 1200 ÷ 2 = 600 SI for 3 years = 600 × 3 = 1800 Principal = 9200 − 1800 = 7400

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