A can do a piece of work in 80 days. He works at it for 10 days and then B alone finishes the work in 42 days. The Two together could complete the work in?
A. 24 days
B. 25 days
C. 30 days
D. 35 days
Answer:C
A can do a piece of work in 80 days. He works at it for 10 days and then B alone finishes the work in 42 days. The Two together could complete the work in?
A. 24 days B. 25 days C. 30 days D. 35 days