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 completed?
A. 11 days
B. 13 days
C. 12 days
D. 14 days
Answer:A
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 completed?
A. 11 days B. 13 days C. 12 days D. 14 days