If P and Q together can do a job in 15 days, Q and R together can do it in 12 days and P and R together can do the same in 20 days, then in how many days will the job be completed, if all the three work together?
A4 days
B6 days
C10 days
D14 days
A4 days
B6 days
C10 days
D14 days
Related Questions:
A can do th of a work in 4 days and B can do th of the same work in 5 days. In how many days they can finish the work, if they work together?