1.

A, B and C can do a piece of work in 24 days, 30 days and 40 days respectively. They began the work together but C left 4 days before the completion of the work. In how many days was the work complete

Answer»

11 DAYS



One day work of A, B and C = 1/24 + 1/30 + 1/40 = 1/10 Work done by A and B together in the last 4 days = 4*(1/24 + 1/30) = 3/10

Remaining work = 7/10

The NUMBER of days REQUIRED for this initial work = 7 days.

The total number of days required = 4 + 7 = 11 days.



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