Simple proportion - practice for 13 year olds - last page
Number of problems found: 200
- 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? - Diver and pressure
Determine what pressures are exposed diver without a suit at a depth of 15 meters, with a small space suit at a depth of 25 meters and a massive suit at 70 m in water. - 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 - Switzerland 3584
Zuzka and Hanka used to work in a cherry orchard to earn money for a sightseeing trip to Switzerland. They brushed 15 trees every day and harvested the entire orchard in 10 days. How long would it take them to harvest the entire orchard if they brushed 20
- Proportion
Write the following proportion: Eight is to 64 as to 2 is to x - Department 3500
The city plan has a scale of 1:5 0000, which determines the actual dimensions of a department store that has a length of 18 mm and a width of 25 mm. - Toothpaste 3479
A full tube of toothpaste is enough for one family member for six weeks. How long will three family members last? - Two-meter 3473
A tree with an unknown height casts a shadow 18 m long at a time, while a two-meter pole casts a shadow of 2.4 m. How tall is the tree? - Loading car
The car was loaded with 78 boxes weighing 19 kg. How many 25kg boxes can it load if the total weight is the same?
- Painters
Five painters painted the fence for eight days. How many days over will it take to work if they paint the fence with only four decorators? - Collecting
For the first week of material, collection events are picked up at the school 850 kg of paper and 305 kg of rags, representing 55% of the total collection for 14 days. How many kilograms of secondary raw materials were handed over in total? - Cylinder
The cylinder-shaped container has 80 liters of water. The water reaches 45 cm in height. How many water liters will be in a container if the water level extends to a height of 72 cm? Write the result in liters. Write down only as a whole or decimal number - 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? - Segment in a triangle
In a triangle ABC with the side/AB/ = 24 cm constructed middle segment/DE/ = 18 cm parallel to the side AB at a distance of 1 cm from AB. Calculate the height of the triangle ABC to side AB.
- Solve
Solve this direct relation by the triplet: 0.25h. .. . . .. .. . . .. .. .. 3 pcs 6.5h. .. . . .. .. . . .. .. . . .. .. x pcs - Drying apples
By drying, apples lose 85% of their weight. How many kgs of dried apples do we get from 820 kilograms of fresh? - Water inlets
An Inlet valve with a flow rate of 12 liters per second is filled tank for 72 minutes. How long does it take to fill the full tank if we open one more such valve half an hour after? - New computer
The new computer process a certain amount of data for 6 hours. How many hours will process the same amount of data older computer with a quarter lower performance? - 4 pipes
The tank flows out by four pipes in 6 hours 120 hl water. How much water flows out of 5 pipes of the same diameter in 14 hours?
Do you have homework that you need help solving? Ask a question, and we will try to solve it.
Simple proportion - math word problems. Maths practice for 13 year olds.