Assembly parts

Nine machines produce 1,800 parts on nine machines. How many hours will it produce 2 100 parts on seven such machines?

Correct answer:

t =  12 h

Step-by-step explanation:

$$\begin{gathered} s=1800\mathrm{/}(9\cdot 8)=25 \\ t=2100\mathrm{/}(7\cdot s)=2100\mathrm{/}(7\cdot 25)=12\text{ h} \end{gathered}$$

Try another example

Related math problems and questions:

• Three machines
  The power of the three machines is 2: 3: 5. Two most powerful machines produce 400 parts per hour. How many components make all three machines in 3 hours?
• Machines
  In the workshop are three machines. The first is treated 250 parts for 4.7 hours, the second is treated 300 parts for 1.9 hours, and the third is treated 230 parts for 4.6 hours. How long will it take to make 3100 parts if worked all three machines at the
• Bulbs and electricity
  In the sports hall, 875 identical light bulbs light for 2 hours. How long does it take for 100 such light bulbs to consume the same amount of electricity?
• Machines 2
  2 machines for 50 hours produces 2,000 products. How many machines need to buy to make in 30 hours 15,000 products?
• Pennies
  800 pennies have the same value as 100 ducats. 100 pennies have the same value as 250 tolars. How many ducats has the same value as 100 tolars?
• Two machines
  The first machine can produce parts in 24 hours, the second in 16 hours. The first started working at 6:00 pm. Second at 10:00 o'clock. At what hour were all parts made?
• 4 pipes
  The tank flows out by 4 pipes in 6 hours 120 hl water. How much water flows out of 5 pipes of the same diameter in 14 hours?
• Two masters
  The two masters will make as many parts as five apprentices at the same time. An eight-hour shift begins at 6 o'clock. When can a master finish the job to produce just as much as an apprentice for the whole shift?
• 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?
• The work
  The work was to be done by 150 workers. At the beginning of their work, their number reduced by 40, which increased the time of work by 5 and 1/3 of the schedule. How long did work take?
• Electric energy
  There are 875 identical light bulbs in the sports hall lighting for 2 hours. How long does the same amount of electricity consume 100 such bulbs?
• Pumps
  Four identical pumps fill the tank in 40 hours. How many pumps would we have to use if we wanted to save 8 hours?
• Workers
  9 workers dig a canal 120 meters long for eight hours. For how long would be dig five workers canal 200 meters long?
• In the
  In the workshop, it was necessary to quickly complete the production of veils for the hospital. The workshop staff promised to work an additional 240 hours to produce this order in March. The workshop has eight employees who work 160 hours a month. What p
• In the bakery
  In 2.25 hours, 24 pieces of bread are baked in the bakery. How many breads are baked in the bakery in 6 hours and 45 minutes?
• 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?
• Seven workers
  Seven workers clear the glade in 22 hours. How many workers would need to be done in 8 hours?