RRB Junior Engineer / DMS / CMA 2019 · Question 1546 of 3719

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?

1. A10 daysCorrect
2. B6 days
3. C4 days
4. D14 days