Time and Work Questions

A and B complete a work in 12 and 15 days, respectively. They started the work alternatively for 1 day each and A started the work first. In how much time will 60% of the work be completed?

A can complete a piece of work in 12 days while B can do the same work in 18 days. If they both work together, then how many days will be required to finish the work?

A and B working together can complete a job in 30 days. The ratio of their efficiencies is 3:2. In how many days can the faster person complete the job?

If 12 men or 20 women can do a work in 54 days, then in how many days can 9 men and 12 women together do the work?

A frog was at the bottom of an 80m deep well. It attempted to come out of it by jumping. In each jump, it covered 1.15m but slipped down by 0.75m. The number of jumps after which it would be out of the well is:

A can do a certain job in 12 days. B is 60% more efficient than A. To do the same job B alone would take:

Eight labourers working 10 hours a day completed a work in 18 days. If only 5 labourers are working, then in how many hours a day should they work to finish the work in 24 days?

A and B can do a work in 15 days and 30 days, respectively. They start working together, but A leaves after 3 days. How much time will B take to complete the remaining work?

If 108 workers can build a wall in 36 days, then in how many days can 48 workers build the same wall?

A garrison of 140 men has provisions for 35 days. At the end of 10 days, 35 more men joined them. How many days can they sustain on the remaining provisions?

At a construction site, 15 men or 10 machines can construct a room in 66 days. In how many days can 5 men and 4 machines together complete the work?

A can do a piece of work in 12 days, and B can do the same work in 15 days. With the help of C, they can finish the work in 5 days. How long will it take C to finish the work?