Question

P, Q and R can finish a work in 5 days, 10 days, and 15 days, respectively, working alone. P and Q works on first day, P and R works on second day and P and Q works on third day and son on till the work is completed. In how many days the work will be completed?

A 13/2
B 9/2
C 7/2
D 5/2
Practice Next

Hey! Ask a query