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6th Class Mathematics Related to Competitive Exam Question Bank Time and Work

  • question_answer
    A can do a piece of work in 9 days, B can do the same in 12 days, In how many days can the work be complete if A and B work together?

    A)  \[3\frac{1}{7}\] days       

    B)           \[9\frac{1}{7}\] days

    C)  \[4\frac{1}{7}\] days                        

    D)  \[5\frac{1}{7}\] days

    Correct Answer: D

    Solution :

        One day work of A and \[B=\frac{1}{9}+\frac{1}{12}=\frac{7}{36}\] So, they can complete the work in \[\frac{36}{7}\] i.e., \[5\frac{1}{7}\] days.


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