Time and Work

A does 30% of a work in 30 days. He then calls in B and together, they finish the remaining work in 20 days. How long would B alone take to do the whole work?

P and Q can do a project in 150 and 100 days, respectively. In how many days can they complete 60% of the project if they work together?

A is thrice as productive as C. Together they can complete a job in 22.5 days. If B joins them after they have worked for 15 days, then in how many days can they finish the rest of the job, given that B alone can do the job in 15 days?

A, B and C can together do a job in 9 days. C alone can do the job in 36 days. In how many days can A and B do 50% of the job working together?

Working together, A, B and C can complete a task in 12 days. A and B can do the task in 55 days and 66 days, respectively, if they work alone. In how many days can C do the task if he works alone?

A is thrice as good a workman as B. C alone takes 48 days to paint a house. When working together, A, B and C take 16 days to paint the house. How many days will it take for B alone to paint the house?

A can complete 50% of a job in 9 days and B can complete 25% of the job in 9 days, when working alone. If they work together, how much of the job (in %) can they complete in 9 days?

A can do a piece of work in 40 days. A and B started doing the work, but midway through it, B got ill and was absent from work for 4 days. Due to this, the work was completed by both of them in 2 more days than the scheduled time. In how many days can A and B complete the piece of work?

Two teams are working on a project and their productivities are different. They worked together and two-third of the project is completed by the first team and the rest by the second team, then the entire work would be completed in 4 days. How long did it take for the slower team to complete the project separately?

A is twice as efficient as B and B is twice as efficient as C. If A, B and C work together, a piece of work will be completed in 12 days. A and B start it together and continue for 8 days. After that, A is replaced by C. For his work, A gets paid Rs. 2000. What amount will B get paid?

Rahul can complete a piece of work in 15 days, working 6 hours a day. Seema can complete the same work in 10 days, working 8 hours a day. If Rahul and Seema work together, working 6 hours a day, then in how many days can they complete the work?

Gurmeet does half as much work as Raju does in three-fourth of the time. If together they take 20 days to complete the work, then how much time shall Raju alone take to do it?

Kirti and Sham can do a piece of work in 30 days and 25 days, respectively. Kirti started the work alone and then after 7 days, Sham joined her till the completion of the work. How long did the work last?

X can do a piece of work in 5 days while Y can do the same work in 4 days. Both of them finish the work together and get Rs. 250. What is the share of X?