Multiple Choice Questions on At what percentage simple interest per annum a certain sum will double itself in 10 years ........ for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

At what percentage simple interest per annum a certain sum will double itself in 10 years ........

Quantitative Aptitude (RRB NTPC) Simple Interest
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    At what percentage simple interest per annum a certain sum will double itself in 10 years?

    7%

    Incorrect Answer

    8%

    Incorrect Answer

    9%

    Incorrect Answer

    10%

    Correct Answer
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    Explanation:
    Let the principal be P
    Since the sum will be doubled in 10
    years
    SI in 10 years = P
    PRT/100 = P
    R x 10 = 100
    R = 10 %

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