Time + inverse relationship - practice problems - page 7 of 9
Number of problems found: 170
- Pumps
Five pumps pumped 1,800 hl of water for 3 hours. How many hectoliters of water pump same two powerful pumps for six hours? - 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
- 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? - Together 3491
One painter would paint the school in 15 days. Together with the second painter, they painted the school in 6 days. In how many days the second painter would have painted the school himself? - Twenty-seven 3476
Twenty-seven workers did the work in 12 days. In how many days would nine workers do the same job? - 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? - Tributary 3466
The swimming pool is filled with four inflow pipes in 9 hours. If one tributary is broken, how long will it be filled?
- Shelter 3446
The shelter buys a supply of food for 12 dogs for one week. How many days will this supply last if two more dogs are added to the shelter? - Ninety-six 3420
Ninety-six soldiers will build a pontoon bridge in 5 hours. How long before the same bridge creates 54 soldiers? - Water reservoir
The water reservoir is filled with one pump for four days by the second one for nine days. An outlet can drain the tank in 12 days. How long does it take to fill the reservoir if both pumps are running and not closed outlet channels? - Shadow and light
Nine meters height poplar tree has a shadow 16.2 meters long. How long does shadow have at the same time as Joe if he is 1,4m tall? - Shipwrecked 2854
The naval ship had 150 people on board and food supplies for 60 days. The captain took on board 30 shipwrecked sailors. For how many days do they have food supplies?
- Registers 2827
When eight cash registers are open in the grocery store, customers wait for an average of 12 minutes. What will be the waiting time if the other two cash registers open? - Conservationists 2820
A group of nature conservationists (a total of 28 members) and a sports team (16 members) worked for 7 days to clean up the forest park with an area of 10 ha. How many days would conservationists have to work without the help of athletes? - Enough 2809
Five horses will eat oat stocks in 15 days. For how many days is the supply for three horses enough? - Identical 2804
Eighty identical light bulbs shine in the sports hall for two hours. How long does it take to consume the same energy from 100 such bulbs? - Construction 2798
The truck driver drives bricks for construction. If he went three times a day, he would produce the bricks needed for construction in 12 days. How many times a day does he have to go to finish work three days earlier?
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Do you want to convert time units like minutes to seconds? Time - practice problems. Inverse relationship - practice problems.