Raj can do a piece of work in 20 days. He started the work and left after some days, when 25% work was done. After it Ab…

A group of workers was put on a job. From second day onwards, one worker was withdrawn each day. The job was finished wh…

A can do a certain work in 12 days. B is 60% more efficient then A. How many days will B and A together take to do the s…

A can do a piece of work in 20 days and B in 40 days. If they work together for 5 days, then the fraction of the work th…

A and B together can complete a work in 12 days. B and C together can complete the same work in 8 days and A and C toget…

If A and B together can complete a work in 18 days, A and C together in 12 days, and B and C together in 9 days, then B …

A contractor undertakes to make a road in 40 days and employs 25 men. After 24 days, he finds that only one-third of the…

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 …