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    Question

    A certain amount becomes four times itself when invested

    at r% per annum simple interest for 12 years. What is the value of r?
    A 25% Correct Answer Incorrect Answer
    B 40% Correct Answer Incorrect Answer
    C 60% Correct Answer Incorrect Answer
    D 32% Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the amount invested be Rs. x

    According to the question,

    Image
    Therefore, r = 25%

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