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    Question

    Rs. 1800 earns a simple interest of Rs. 4050 when

    invested at 15% per annum for (x + 3) years. What will be the total amount received if the same amount is invested at 7.5% p.a. for '2x' years?
    A Rs.3340 Correct Answer Incorrect Answer
    B Rs.7040 Correct Answer Incorrect Answer
    C Rs.5000 Correct Answer Incorrect Answer
    D Rs.5040 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    {1800 ├Ч 15 ├Ч (x + 3)}/100 = 4050 Or, 270(x + 3) = 4050 Or, x + 3 = 15 Or, x = 12 Therefore, 2x = 24 years Required amount received = {(1800 ├Ч 7.5 ├Ч 24)/100} + 1800 = Rs.5040

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