1.

Two persons A and B can finish a piece of work in 60 days, while A, B, and C can finish the same work in 40 days. How many days will C alone take to finish the work ?

Answer»

120 days



WORK DONE by A and B TOGETHER in one day = 1/60
Work done by A, B and C together in one day = 1/40
Work done by C in one day= 1/40 - 1/60 = 3-2/120 = 1/120
∴ C will TAKE 120 days to finish the work.



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