Time & Work Mock Tests

A pipe can fill a tank in 6 hours and another pipe can empty the same tank in 8 hours. If both pipes are opened simultaneously, how many hours will it take to fill the empty tank?

A and B can complete a piece of work in 12 days and 15 days respectively. If they work together, how many days will they take to complete the work?

A pipe can fill a tank in 12 hours. Another pipe can empty the full tank in 15 hours. If both pipes are opened, how much time will it take to fill the tank?

A can do a work in 10 days and B can do the same work in 15 days. A works alone for 5 days and then B joins. How many more days will they take to complete the work together?

A and B can complete a piece of work in 12 days and 18 days respectively. They work together for 4 days before A leaves. The total time taken to complete the work is:

A pipe can fill a tank in 6 hours and another pipe can empty it in 8 hours. If both pipes are opened simultaneously, how long will it take to fill the tank?

A can complete a piece of work in 10 days and B can complete it in 15 days. They work together for 4 days and then A leaves. The total time taken to complete the work is:

A is twice as efficient as B. If B can complete a work in 12 days, the work will be completed by both A and B together in: