Multiple Choice Questions on A sum of money becomes 3 times in 5 yr at simple interest In how many years will the same sum become........... for CDS Exam Preparation

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Multiple Choice Questions

A sum of money becomes 3 times in 5 yr at simple interest In how many years will the same sum become...........

Quantitative Aptitude (CDS) Simple Interest
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    A sum of money becomes 3 times in 5 yr at simple interest. In how many years, will the same sum become 6 times at the same rate of simple interest?

    10yr

    Incorrect Answer

    12 yr

    Incorrect Answer

    12.5 yr

    Correct Answer

    10.5 yr

    Incorrect Answer
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    Explanation:

    Let principal amount P be Rs. x
    Amount A = 3x
    T = 5 yr
    SI = 3x − x = 2x
    Suppose rate of interest be R
    By formula SI =PRT/100
    2x=x×R×5/100
    R = 40%
    Required amount = 6x
    SI = 6x − x = 5x
    Required time =100×SI/P×R
    = 12.5 yr

    By: Munesh Kumari
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