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    Question

    At a certain rate of simple interest, a sum becomes five

    times of itself in 32 years. What is the value of (5R - 18)?
    A 42 Correct Answer Incorrect Answer
    B 90 Correct Answer Incorrect Answer
    C 58 Correct Answer Incorrect Answer
    D 32 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the principal be Rs. 'P'.

    Interest earned = 5P - P = Rs. '4P'

    Using SI formula: 4P = P ├Ч R ├Ч 32 ├╖ 100

    тЗТ R = 12.5

    Required value = 5 ├Ч 12.5 - 18 = 44.5

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