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      Question

      The simple interest on a sum for 2 years at 10% per

      annum is Rs 4,000. Find the difference between the compound interest and the simple interest on the same sum, at the same rate and time.
      A 800 Correct Answer Incorrect Answer
      B 300 Correct Answer Incorrect Answer
      C 500 Correct Answer Incorrect Answer
      D 200 Correct Answer Incorrect Answer

      Solution

      Let principal = P. SI for 2 years = P Γ— 10 Γ— 2 /100 = P/5 Given P/5 = 4,000 β‡’ P = 20,000 Difference (CI βˆ’ SI) for 2 years at rate r% = P Γ— (r/100)Β² r = 10 β‡’ r/100 = 0.10 Difference = 20,000 Γ— (0.10)Β² = 20,000 Γ— 0.01 = Rs 200.

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