Bricklayers

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Next similar math problems:

1. Our house
   Our house would paint four painters in 14 days. How long could it paint five painters? How long will it take if two other painters will come to help after 5 days?
2. Workers
   Group of workers washing half of the windows of the building in two hours. How long will take half the workers wash all the windows of the building?
3. Family
   Mom is 42 years old and her daughters 13 and 19. After how many years will mother as old as her daughter together?
4. Mom and daughter
   Mother is 39 years old. Her daughter is 15 years. For many years will mother be four times older than the daughter?
5. Hectoliters of water
   The pool has a total of 126 hectoliters of water. The first pump draws 2.1 liters of water per second. A second pump pumps 3.5 liters of water per second. How long will it take both pumps to drain four-fifths of the water at the same time?
6. The tank
   The tank had 9 inflows to be filled in 21 days. After 9 days, 3 trips out. How many days did the remaining 6 tributaries fill the tank?
7. Repair pipe
   20 workers had to repair broken pipes in 30 days. After fourteen days, four laborers joined them. How long did the pipe repair work last?
8. Digging companies
   Company A would dig a pit for 12 days, company B for 15 days, company C for 20 days and the company D for 24 days. Work began together companies C and D, but after three days joined them other two companies. How long took to dig a pit?
9. Three people
   Three people start doing a work at a same time. The first worked only 2 hours. The second ended 3 hours before the end. On an individual basis, it would take the first time to do the work 10 hours, second 12 hours and 15 hours third. How many hours did it
10. Five pupils
    Five pupils clean 30 chairs one hour before four pupils. How many chairs clean one pupil in 1 hour?
11. Tonic
    One package tonic consume Mom 12 weeks and daughter for 14 weeks. 4 weeks they use the same cream together and then only daughter. How many weeks endured tonic to daughter then?
12. Novak
    Novak needed to dig up three of the same pit in the garden. The first pit dug father alone for 15 hours. His second dig son helped him and it did that in six hours. The third pit dug son himself. How long it took him?
13. Three painters
    One painter would have painted the fence for 15 hours, the second in 12 hours. The plot had to be painted in four hours, so they called the third one, and all worked together. For what time would the third painter paint fence the fence alone?
14. Baking muffins
    Aunt Polly is baking muffins at a speed of 4 muffins per minute. Tom comes into the kitchen when Aunt Polly has 12 muffins, and begins to eat these muffins at a speed of 6 muffins per minute. When he finally leaves the kitchen, there are 4 muffins at the
15. 5 pumps
    Five pump to pump 3 hours 1600 hl of water. How long pumped same amount of water 4 pumps?
16. Walnuts
    x walnuts were in the mission. Dano took 1/4 of nuts Michael took 1/8 from the rest and John took 34 nuts. It stayed here 29 nuts. Determine the original number of nuts.
17. Fifth of the number
    The fifth of the number is by 24 less than that number. What is the number?