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    Question

    The difference between the compound interest, compounded

    annually and simple interest on Rs. ‘P’ at the rate of 25% p.a. for 2 years, is Rs. 100. If Rs. (P + 1600) is invested at the same rate p.a., then find the compound interest, compounded annually earned after 3 years.
    A Rs. 3591 Correct Answer Incorrect Answer
    B Rs. 3355 Correct Answer Incorrect Answer
    C Rs. 3050 Correct Answer Incorrect Answer
    D Rs. 3822 Correct Answer Incorrect Answer

    Solution

    Using formula Difference = Sum(R/100)2 Or, 100 = P(25/100)2 Or, 100 = P(625/10000) Or, 0.0625P = 100 Or, P = 1600 Sum that is invested on compound interest = 1600 + 1600 = Rs. 3200 Compound interest = 3200(1 + 25/100)3 – 3200 = 3200 × (5/4) × (5/4) × (5/4) – 3200 = 6250 – 3200 = Rs. 3050

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