If A and B can finish a work in 10 days, B and C can finish the same work in 12 days, C and A can finish the same work in 15 days; then in how many days can A, B and C together finish half of the work?

A can do a certain work at twice the speed of B. Further, B can do the same work at 1.5 times the speed of C. All of them together can finish the work in 12 days. In how many days can C alone finish…

Two persons A and B complete a task in 15 days, when they work together. Person A completes the task in 20 days if he works alone. How many days will B take to finish the task alone?

A can do a work in 15 days and B in 20 days. If they work on it together for 4 days, then the fraction of the work that is left is :

Two persons A and B working together, can dig a trench in 8 hours, while A alone can dig it in 12 hours. In how many hours B alone can dig the same trench?

A can complete a particular task in 25 days whereas B can finish that task in 15 days. A and B together do the work for 5 days and then A leaves the task. How many days will B take to complete the re…