Multiple Choice Questions on A sum of money triples itself in 12 years 6 months In how many years would it double itself ........ for CDS Exam Preparation

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Multiple Choice Questions

A sum of money triples itself in 12 years 6 months In how many years would it double itself ........

Quantitative Aptitude (CDS) Compound Interest
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    A sum of money triples itself in 12 years 6 months. In how many years would it double itself?

    6 years 

    Incorrect Answer

    6 years 3 months

     

    Correct Answer

    5 years 9 months

    Incorrect Answer

    7 years 2 months

    Incorrect Answer
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    Explanation:

    Let sum = x. then, SI = 2x and time = 25/2 years.
    Rate = (100 × 2x ×2)/ (x × 25) = 16%
    now sum = x, SI = x and Rate 16%
    Time = (100 × x) / x × 16
     Time = 6 years 3 months

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