AFCAT || Numerical_Ability || Time_and_Work_Quiz

X can do a certain work in the same time in which Y and Z together can do it. X and Y together can do it in 15 days and Z alone can do it in 60 days, then Y alone could do it in :

A and B can do a piece of work in 18 days and 12 days respectively. A started the work alone and then after 3 days B joined him till completion of the work. How long did the work last?

A, B and C together earn Rs. 720 per day, while A and C earn together Rs. 432 and B and C together earn Rs. 388. The daily earning of C is -

14 men can complete a work in 8 days. After they have worked for 4 days, 2 more men join them. How many days will they take to complete the remaining work?

When P, Q and R are deployed for a task, P and Q together do 80% of the work and Q and R together do 40 % of the work. Who is most efficient?