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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 ×100)/ (R × T) = (3360 × 100)/ (7 × 3) = 16000 CI = P [1+ R/100]t - P CI = 32000[1+ 7/100]2 - 32000 CI = 32000 × 107/100 × 107/100 - 32000 => 2(18318.4 – 16000) => Rs. (2318.4)×2=4636.8.

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