Amit and Sumit can plough a field in 4 days. Sumit alone can plough the field in 6 days. In how many days will Amit alon…

George takes 8 hours to copy a 50-page manuscript while Sonia can copy the same manuscript in 6 hours. How many hours wo…

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

A can do a piece of work in 12 days and B in 20 days. If they together work on it for 5 days, and remaining work is comp…

If m men can do a work in r days, then the number of days taken by (m + n) men to do it is :

If 72 men can build a wall of 280 m length in 21 days, how many men could take 18 days to build a similar type of wall o…

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 road of 5 m length will be constructed in 100 days. So, 280 workers were employed. But after 80 days it was found that…