In How Many More Days is the Work Completed? If

20 men can do a piece of work in 18 days. They worked together for 3 days, then 5 men joined them. In how many more days is the work completed?

  1. 12
  2. 14
  3. 15
  4. 13
Monis Rasool Professor Asked on 8th July 2015 in Maths.
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  • 1 Answer(s)

    Answer: (1) 12 days
    Explanation:-
    20 men can do piece of work = 18 days
    20 men can do work in a day = 1/18
    Therefore,  20 men can do work in 3 days = 3/18 = 1/6
    Remaining work = 1 – 1/6 = 5/6
    5 men joined them
    Then, the number of men = 20 + 5 = 25
    25 men can do work in a day = 6 x 25/18 x 20 x5 = 1/12
    25 men can do work complete =  12 days
    Hence, the answer is (1) 12 days.

    Anurag Mishra Professor Answered on 8th July 2015.
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