How Much Work will me Left?If

A can do piece of work in 25 days and B can do the same work in 30 days. They work together for 5 days, how much of work left?

  1. 15/30
  2. 19/30
  3. 11/30
  4. 12/30
Monis Rasool Professor Asked on 27th June 2015 in Maths.
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  • 1 Answer(s)

    Answer: (2) 19/30
    Explanation:-

    A can do a piece of work = 25 days
    A can do work in a day = 1/25

    B can do a piece of work = 30 days
    B can do work in a day = 1/30

    They do work together in 5 days = 5(1/25 + 1/30)
    = 5(6 + 5)/150
    = 11/30
    Remaining work = 1 – 11/30 = 19/30

    Hence, the answer is (2) 19/30.

    Anurag Mishra Professor Answered on 28th June 2015.
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