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      Question

      On a certain sum, the simple interest for 2 years at 10%

      per annum is Rs 2,000. Find the compound interest on the same sum at the same rate and time, compounded annually.
      A Rs 1,000 Correct Answer Incorrect Answer
      B Rs 2,100 Correct Answer Incorrect Answer
      C Rs 4,100 Correct Answer Incorrect Answer
      D Rs 3,100 Correct Answer Incorrect Answer

      Solution

      Let principal = P. SI for 2 years: = P Γ— 10 Γ— 2 / 100 = P/5 Given P/5 = 2,000 β‡’ P = 10,000 For CI: Amount A = P(1 + 10/100)Β² = 10,000 Γ— (11/10)Β² = 10,000 Γ— 121/100 = 12,100 CI = A βˆ’ P = 12,100 βˆ’ 10,000 = 2,100 Answer: Compound Interest = Rs 2,100.

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