Time + work - practice problems - page 29 of 31
Number of problems found: 612
- Pumps 3
Two pumps of the same power fill the garden pool for 10 hours. How many of these pumps would we have to use if we want to shorten the filling of the pool to four hours? - Supermarket cashiers
When only two checkouts are open in a supermarket, people wait in line for an average of 12 minutes. How much will the average waiting time in line be reduced if they open three more ticket offices? - Floating floor
In the new building is considered a floating floor worker in each room. Thirty minutes lay 9 m² of the floor. How long did three workers lay the floor in 4 rooms with a total area of 90 m²? - Two workers
Two workers together execute some work in 10 days. The first worker would have done it himself in 20 days. How many days would they have done himself a second worker?
- Copiers
The new copier is copying a folder of papers 5 minutes faster than the old one. The operator used new, but out of toner and exchange took 5 min at that time copied on the old. The whole work was done in 9 min. How long would the work do only by the old co - 4 pipes
The tank flows out by four pipes in 6 hours 120 hl water. How much water flows out of 5 pipes of the same diameter in 14 hours? - 5 pumps
Five pumps to pump 3 hours 1600 hl of water. How long pumped the same amount of water from four pumps? - Invitations
For every 5 minutes, writes Dana had ten invitations, while Anna had 14 invitations. How long will write together 120 invitations? - Painters
One painter could paint a school for seven days. The second one does it for six days. It was necessary to paint the school in two days. The next painter was invited, and all worked together. How long would this painter paint the school itself?
- Painting
Joseph with Fero painted the bench for four hours. How many hours would it take to work if four friends helped him? - Mukls
The six workers' working group would order jobs completed within 21 working days. How many workers must be added to complete a contract in 14 working days? - Wood
Peter chops wood. If they cut down a half hour a day, he ended work in 9 days. But Peter needs to end work three days earlier. How many minutes should a day cut down? - Cooks
Four cooks cleaned 5 kg of potatoes for 10 minutes. How many cooks would have to work cleaning 9 kg of potatoes for 12 minutes? - Greenhouses
Two workers would make installation of greenhouses for 54 hours. For how many hours does the installation have nine workers?
- Painting school
Redecoration school had scheduled for four crew to 10 days. After two days, a single worker was ill. For how many days was the school painted when remain workers working with the same tempo? - Pumps
The first pump flows 16 liters per second into the basin by the second pump 75% of the first and by the third pump half more than the second. How long will it take to fill the basin with all three pumps simultaneously, a volume of 15 m³ (cubic meters)? - James
James paints a fence. If he painted every day, instead of 14 planks, he would do 16 one day earlier. How many planks have a fence altogether? - Digging companies
Company A would dig a pit for 12 days, company B for 15 days, company C for 20 days, and company D for 24 days. Work began together with companies C and D but after three days. They joined the other two companies. How long took to dig a pit? - Workhorses
A team of colleagues did the work in 20 days. After adding two colleagues from the beginning, the team completed the work in 15 days. How many members has the colleague team?
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