Multiple Choice Questions on Ramesh can finish a piece of work in 14 days while Rakesh can do it in 18 days If both work to........... for CDS Exam Preparation

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Multiple Choice Questions

Ramesh can finish a piece of work in 14 days while Rakesh can do it in 18 days If both work to...........

Quantitative Aptitude (CDS) Time and work
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     Ramesh can finish a piece of work in 14 days while Rakesh can do it in 18 days. If both work together, what time will they take to do the work?

    5(7/4)days

    Incorrect Answer

    6days
     

    Incorrect Answer

    8days
     

    Incorrect Answer

    7(4/5)days

    Correct Answer
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    Explanation:

    Efficiency of Ramesh = 100/14 = 7.14%
    Efficiency of Rakesh = 100/18 = 5.55%
    Combined efficiency of Ramesh and Rakesh = 7.14+5.55 = 12.69%
    Number of days taken by Ramesh and Rakesh, when worked together 
    =100/12.69 = 7(4/5) days

    By: bhavesh kumar singh
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