Two pipes can fill an empty tank separately in 24 minutes and 40 minutes respectively and a third pipe can empty 30 gall…

A and B can do a job together in 7 days. A is $$1\frac{3}{4}$$  times as efficient as B. The same job can be do…

If A, B and C can complete a piece of work in 6 days. If A can work twice faster than B and thrice faster then C, than t…

42 women can do a piece of work in 18 days, How many women would be required do the same work in 21 days.

A and B can together finish a work in 30 days. They worked together for 20 days and B left. After another 20 days, A fin…

While working 7 hour a day, A alone can complete a piece of work in 6 days and B alone in 8 days. In what time would the…

A man undertakes to do a certain work in 150 days. He employs 200 men. He finds that only a quarter of the work is done …

If 12 carpenters working 6 hours a day can make 460 chairs in 240 days, then number of chairs made by 18 carpenters in 3…