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      Question

      Soni gets a SI of Rs. 3360 on a certain principal at the

      rate of 7%p.a. in 3 years. What CI will she get on twice the principal in two years at the same rate?
      A Rs. 3218.4 Correct Answer Incorrect Answer
      B Rs. 2118.4 Correct Answer Incorrect Answer
      C Rs. 2538.4 Correct Answer Incorrect Answer
      D Rs. 4636.8. Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      P= (SI ├Ч100)/ (R ├Ч┬аT) = (3360 ├Ч┬а100)/ (7 ├Ч┬а3) = 16000 CI = P [1+ R/100]t┬а- P CI = 32000[1+ 7/100]2┬а- 32000 CI = 32000 ├Ч┬а107/100 ├Ч┬а107/100 - 32000 =>┬а2(18318.4 тАУ 16000) =>┬аRs. (2318.4)├Ч2=4636.8.

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