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    Question

    A man invested Rs. 10,000 at simple interest of 15% p.a.

    If he had instead invested the same sum on compound interest of 15% p.a., compounded annually, then how much more he would have earned as interest after 3 years?
    A Rs.788.75 Correct Answer Incorrect Answer
    B Rs.665.75 Correct Answer Incorrect Answer
    C Rs.708.75 Correct Answer Incorrect Answer
    D Rs.765.75 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ Simple interest = Sum ├Ч (rate of interest/100) ├Ч (time in years) Simple interest earned in three years = 10,000 ├Ч (15/100) ├Ч 3 = Rs. 4,500 Compound interest earned in three years: = 10,000 ├Ч {1 + (15/100)}┬│ - 10,000 = 10,000 ├Ч (1.15)┬│ - 10,000 = 10,000 ├Ч 1.520875 - 10,000 = Rs. 15,208.75 - 10,000 = Rs. 5,208.75 So, required difference = 5,208.75 - 4,500 = Rs. 708.75

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