Lumberjacks

Fifteen lumberjacks would take 12 days to destroy the broken trees. How many days would this work require if 5 workers added to it after 4 days?

Correct result:

t =  10

Solution:

15•12 = 15•4+(5+15)•(t-4)

20t = 200

t = 10

Our simple equation calculator calculates it.

Try another example

Showing 0 comments:

Next similar math problems:

• Diggers
  The excavation was carried out in 4 days and 5 workers worked on it for 7 hours a day. Determine how long it would take to excavate if 7 workers worked on it 8 hours a day.
• Four workers
  Four workers lay the gym floor in six hours. After an hour of working together, one of the workers went to the doctor. How long will it take for the remaining three workers to complete their work?
• Painting rooms
  If Dano paint three hours daily given work he complete in 7.5 days. How many hours a day would have to work to finish the job 1.5 days earlier?
• Five pumps
  The water tank is filled with two pumps in 48 minutes. How long would it take to fill it with 5 same pumps?
• Six workers
  Six workers earned a total of CZK 12,600 per week on the construction site (5 working days). How much do 7 workers earn in 10 days with the same daily average salary?
• The orchard
  4 temporary workers harvested the orchard in 9 days. How many temporary workers we need for six days?
• Book reading
  Suzan reads a book. If she read half an hour a day, she would read it in nine days. How many minutes does he have to read a day if he wants to read it three days earlier?
• Painters
  Five painters painting the fence for eight days. How many days over will take work if paint the fence only four decorators?
• Tractors
  Six tractors plowing the field for 8 days. After two days, two tractors broke down. How many days were prolonged work in the field?
• Reading
  If I read 15 pages a day, I will read the whole book in 18 days. How long will it take to read a book if I only read 9 pages every day?
• Working together on project
  Two employees working on the project. First make it alone for 20 days the second for 24 days. How many days will take to complete project if 5 days they work together then first will take two days holiday and after returning they completes a project toget
• Workers
  Ten workers must pave road street for 22 working days. After four days were for speeding up work added two more workers. a) After how many work days now workers completes the paved road? b) How many working days it took a total paved road?
• Pumps
  After the floods, four equally powerful pumps exhausted water from the flooded cellar in 6 hours. How many hours would take a drained out with three equally powerful pumps?
• A lot of hay
  Martin's grandfather weighed a lot of hay and calculated that for 15 rabbits it last in 100 days. How many days will this lot be enough for 25 rabbits?
• Hectares of forest
  12 workers plant 24 ha of forest in 6 days. In how many days will 15 people and 12 people plant the same area?
• Workers
  Two workers fulfill a certain task when working together for 5 days, the first if he worked himself done work in 13 days. How many days will do whole job a second worker?
• Five tractors
  Five tractors plow the fields in 4.8 hours. How long will it take to plow the field when, after an hour and a half of work, two tractor drivers have been called up for another task?