Hay bags

4 cows eat 16 hay bags in 5 days. How many bags will eat 5 cows in 7 days?

Correct answer:

x =  28

Step-by-step explanation:

$$\begin{gathered} k=16\mathrm{/}5\mathrm{/}4={\displaystyle \frac{4}{5}}=0.8 \\ x=5\cdot 7\cdot k=5\cdot 7\cdot 0.8=28 \end{gathered}$$

Try another example

Related math problems and questions:

• Cows
  4 cows spent 16 bags of hay in 5 days. How many bags of hay sacks are needed for 5 cows for seven days?
• Working time
  At 10 hours work shift, work is done in 16 days. How many days will the work be done at 8 hours shifts?
• 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?
• Forestry workers
  In the forest is employed 56 laborers planting trees in nurseries. For 8 hour work day would end job in 37 days. After 16 days, 9 laborers go forth? How many days are needed to complete planting trees in nurseries by others if they work 10 hours a day?
• The farmer
  The farmer calculated that the supply of fodder for his 20 cows was enough for 60 days. He decided to sell 2 cows and a third of the feed. How long will the feed for the rest of the peasant's herd last?
• Three children
  3 children eat 8 chocolates in 6 days. How many chocolates 6 children eat in 18 days?
• Disease
  Farmers'cooperative had a supply of feed for 50 cows to 6 days. Cows got insidious disease after 4 days, 10 of them died. How many total days that farmers had feed for cows?
• Cows
  20 cows has food for 60 days. We reduce the dose to two-thirds for 18 cows. How many days will be fed?
• Painters
  Ten painters paint the school in 20 days. How many days do four painters paint the school at the same pace of work?
• Painting rooms
  If Dano paints three hours daily, he complete in 7.5 days. How many hours a day would have to work to finish the job 1.5 days earlier?
• 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?
• Troops - soldiers
  Food stocks will last 20 soldiers of the 4-day training. How many days they could extend training if four soldiers become sick?
• Sick
  Six seamstresses should make 60 shirts in five business days. After three days two seamstresses were sick. How many days have the remaining seamstresses to finish contract?
• Excavation
  Mr. Billy calculated that excavation for a water connection digs for 12 days. His friend would take 10 days. Billy worked 3 days alone. Then his friend came to help and started on the other end. On what day since the beginning of the excavation they met?
• Cook on gas
  The gas cylinder will last for 30 weekends for 2 hours of daily cooking. How many days will we be able to cook on a new cylinder when we cook for 3 hours a day?
• 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?
• Rabbits
  Michael breeding rabbits. His 7 rabbits will eat 98 feed rations for 7 days. How many equal portions of feed should be eat 5 rabbits in 6 days?