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    Question

    If the simple interest for 6 years be equal to 60% of

    the principal. It will be equal to the principal after
    A 20 years Correct Answer Incorrect Answer
    B 30 years Correct Answer Incorrect Answer
    C 10 years Correct Answer Incorrect Answer
    D 22 years Correct Answer Incorrect Answer

    Solution

    Let the principal be P and rate of interest be r % According to the question, ⇒ R = 10% Now, let the simple interest become equal to principal in T years, P =`(Pxx10xxT)/100` T =` 100/10` = 10 years

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