New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    The time required for a sum of money to amount to 4

    times itself at 15% simple interest p.a. will be
    A 25 years Correct Answer Incorrect Answer
    B 20 years Correct Answer Incorrect Answer
    C 15 years Correct Answer Incorrect Answer
    D 18 years Correct Answer Incorrect Answer
    E 30 years Correct Answer Incorrect Answer

    Solution

    Let Principal = x Amount = 4x Simple Interest = 4x-x=3x Simple Interest = (P ×R ×T)/100 3x = (x ×15 ×T)/100 T = 20 years.

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