A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B…

The time taken by 4 men to complete a job is double the time taken by 5 children to complete the same job. Each man is t…

Two pipes A and B can fill a tank in 36 min. and 45 min. respectively. Another pipe C can empty the tank in 30 min. Firs…

X, Y and Z complete a work in 6 days. X or Y alone can do the same work in 16 days. In how many days Z alone can finish …

A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days and C and A in 20 days. They al…

Three friends Anne, Bob and Chris work together to do a certain job. Time it takes them to do the work together to do a …

A group of workers can complete a piece of work in 50 days, when they are working individually. On the first day one per…

A conveyor belt delivers baggage at the rate of 3 tons in 5 minutes and second conveyor belt delivers baggage at the rat…