How Many Days Requires for B to Finish The Work ? If

A and B together can do a piece of work in 6 days. If A can alone do the work in 18 days, then the number of days required for B to finish the work is

  1. 9
  2. 15
  3. 12
  4. 10
Anurag Mishra Professor Asked on 12th August 2015 in Maths.
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  • 1 Answer(s)
    Best answer

    Answer: (1) 9 days

    Explanation:-
    A and B together can do a piece of work = 6 days
    Therefore, A and B can do a piece of work in a day = 1/6

    A can alone do the work = 18 days
    A can alone do work  in a day = 1/18

    Then, B can alone do work in a day = 1/6 – 1/18
    = (3 – 1)/18
    = 2/18
    = 1/9
    Therefore, B can alone finish the work = 9 days

    Hence, the answer is (1) 9 days.

    Anurag Mishra Professor Answered on 13th August 2015.
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