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A can do a piece of work in 20 days.B can do the same in 15 days.they both together work for 6 days,then B is replaced by C who works with A for next 4 days & finished it.in how many days C alone can do the same work?
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Answer Posted / archana
Answer: C can complete the work in 5 days
work done by A in one day= 1/20
work done by B in one day= 1/15
work done by A and B together in one day= 1/6
work done by A and C together in one day= 1/4
work done by C alone in one day= work done by A and C in one day - work done by A in one day
=(1/4)-(1/20)= 1/5
work done by C alone= 5 days
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