   # A, B and C can do a piece of work in 20, 30 and 60 days.................if he is assisted by B and C on every third day?

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A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day? posted Dec 10, 2015

15 days!
in every 3 days, total work done is= 1/20+1/20+1/20+1/30+1/60 = 1/5
So, total number of days required = 3*5=15. answer Dec 10, 2015 by anonymous

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