Inverse relationship + expression of a variable from the formula - practice problems - last page
Number of problems found: 53
- Two workers
Two workers should fulfill specific tasks together for five days. If the first worker increased their performance twice and the second twice fell, it took them just four days. For how many days would he handle the entire task, the first worker himself? - Orange colour
For the painter to get orange, he has to mix yellow and red in a ratio of 3:4. How many liters of orange did he mix if he used 8 liters of red? - Workers
Nine workers dig a canal 120 meters long for eight hours. For how long would digging five workers' canals be 200 meters long? - Kilometers 4391
The car moved out of place at a speed of 60 km / h in 1.5 hours. The second car moved at a speed of 80 km / h. How long will it take to catch the first car, and how many kilometers will it drive?
- Express 4380
1 / f = 1 / a + 1 / b express b - Bicycle gears
The toothed wheel on the bicycle pedal has 40 teeth, and the wheel on the rear wheel has only 16 teeth. How many times does the rear wheel turn if the pedals rotate 50 times? - Painting rooms
If Daniel paints for three hours daily, he completes it in 7.5 days. How many hours a day would he have to work to finish the job 1.5 days earlier? - Cleaners
Milan would clean up the room for 2.5 hours, and Eric would take 10 hours. How long do they sweep the room together? - Calculation 3620
The mine foreman calculated that 2 pumps must be in operation for 17.5 hours to drain the tunnel. He wanted to speed up the emptying of the shaft and added 3 more identical pumps. How long will it take to empty the shaft? Please also show your calculation
- Twenty-seven 3476
Twenty-seven workers did the work in 12 days. In how many days would nine workers do the same job? - Electrons 3363
How many electrons must be together to put a charge of -1C together? - Multiply 2762
Which number is to multiply the number by to get the number: a) 1 b) m - Disease
Farmers'cooperative had a supply of feed for 50 cows for six days. Cows got insidious disease after four days. Ten of them died. How many total days that farmers had feed cows?
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