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A, B and C can finish a piece of work in 20,30 and 40 ...
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Let when all they work together can finsh work in x days.
A can finish work in 1 day =(1/20) work
so in 5 days he will finish = (5/20) work
B can finsh wiork in 1 day= 1/30 work
so he can finsh work in x days= (x/30) work
C can finish work in 1 day =(1/40) work
so in (x-10) days he can finish= (x-10)/40 work
Posted by pramodpandey on May 13, 2013 at 8:23 AM (Answer #1)
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