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 man and a boy together can do a certain amount of digging in 40 days. Their speeds in digging are in the ratio of 8 : …

A machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine …

Two pipes can fill the cistern in 10hr and 12 hr respectively, while the third empty it in 20hr. If all pipes are opened…

A can complete $$\frac{1}{3}$$ of a work in 5 days and B, $$\frac{2}{5}$$ of the work in 10 days. In how many days bot…

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 and B together can complete a piece of work in 8 days, B alone can complete that work in 12 days. B alone worked for f…

If 10 persons can do a job in 20 days, then 20 person with twice the efficiency can do the same job in: