15 painters painted fence for 280 minutes. For how many minutes paint half of this fence 12 painters?
Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):
Showing 0 comments:
Be the first to comment!
To solve this example are needed these knowledge from mathematics:
Next similar examples:
- Train delay
The train should be in the station for 10 minutes. It still has 32 km left. What is the expected delay if the train travels in 2 minutes 3 km except for the last section where it is 2 km in 5 minutes.
To number pages of thick book was used 4201 digits. How many pages has this book?
- After 16 years
After 16 years will Dana be five times older as she was four years ago. After how many years will Dana celebrate her 16th birthday?
Annie aunt is 35 years old, Annie is 14 years. For how many years will aunt have twice as many years as Annie?
Mom is 39 years old. Karl is eight years and Paul 4 years. For many years mother would old just like two children together?
- Feed for horses
In the kennel have feed for two horses for 21 days. The station brought an additional 5 horses. How many days will last the feed for all the horses if they have the same daily ration?
- The classroom
In the seventh class the number of boys and girls are at a ratio of 4:5. Boys are 16. How many total students are in the classroom?
John, Teresa, Daniel and Paul have summary 56 years. Their ages are in a ratio of 1:2:5:6. Determine how many years have each of them.
- Family 8
Father is 38 years old, daughter 12, son 14. How many years will father have as many years as his children together?
- Turtles Žofka and Julka
Gray wolf kept in his tent turtles Žofka and Julka, which together have 200 years. After 50 years will Julka 2 times older than Žofka. How old are the turtles?
If the daily consumption of 1.6 tons of coal, it is sufficient to supply the boiler for 42 days. How long is sufficient to supply when will burn only 1.2 tons of coal a day ?
In the box are yellow (a), green (b) and red (c) peppers. Their amount is in a ratio 2:4:1 . Most are yellow peppers and green the least. Calculate the number of peppers each type if the total number of peppers is 70.
Susan's age will be after 12 years four times as much as twelve years ago. How old is Susan now?
- Christmas Day
In leap years was 53 Sundays. On what day of the week fell to Christmas Day?
- Two ages
Gabrielle is 9 years younger than Mikhail. The sum of their ages is 87. What is Mikhail's age?
Worker cut his thick log to 6 pieces for 30 min. How long he cut log to 12 pieces?
Andre, Thomas, and Ivan split 88 postage stamps in a 2: 5: 4 ratio. How much did Thomas get?