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  5. Time And Work

Railways Quantitative Aptitude Time And Work Sample Paper Time and Work Sample Test Paper-10

  • question_answer
    A can do \[\frac{1}{2}\] work in 5 days. B can do \[\frac{3}{5}\] of same work in 9 days and C can do \[\frac{2}{3}\] of that work in 8 days. In how many days can three of them together do the work?

    A)  5 days 

    B)  4 days

    C)  3 days 

    D)  4 days

    Correct Answer: D

    Solution :

    [d] A can do 1 work in 10 days B can do 1 work in \[\frac{9\times 5}{3}\] days = 15 days C can do 1 work in \[\frac{8\times 3}{2}\] days = 18 days \[\therefore \] (A + B + C)?s one day work\[=\frac{1}{10}+\frac{1}{15}+\frac{1}{12}\] \[=\frac{6+4+5}{60}=\frac{15}{60}=\frac{1}{4}\] \[\therefore \]  They will complete the work in 4 days.


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