Maths practice for 11-year-olds. - page 102 of 226

Number of problems found: 4508

Pool water calculation
The bottom of the garden pool of circular cross-section has an inner diameter of d = 4 m. The water depth is 0.8 m. How many liters of water can we fill into the pool?
Prism volume calculation
Calculate the volume of a 1.4 m high hexagonal prism container with a base area of 8300 cm².
Three-quarters of a tank
The oil tank is shaped like a cylinder with a height of 8 m and a diameter of 4 m. It is three-quarters full. How much oil is in it?
Barrel paint calculation
How many kg of paint do you need to buy to paint a 1.5 m high cylinder-shaped rainwater cover with a 0.7 m radius? We paint the barrel from the outside and inside, and 100 grams of paint is needed to paint 1 square meter.
Floor varnish calculation
During the reconstruction of the apartment, Mr. Čakaj needed to varnish the floors in two rectangular rooms with dimensions of 6.8 m x 4.5 m and 6 m x 3.8 m. How many cans of paint did he have to buy if he painted 6 m² of the floor with one can?
Height of the triangle
What is the height of the triangle with 7.8 cm² and the side a = 5.2 cm. (Calculation and procedure)
Worker earnings calculation
Twelve workers earned 2,000 euros in 10 days. How many workers would 14 workers earn in 8 days?
Pool painting calculation
We will paint the block-shaped pool, with the dimensions of the bottom a = 25 m and b = 15 m and the height c = 3.5 m. If one kg is enough for five square meters of paint, how many kg of paint will we need?
Ice floe
What is the volume of an ice floe weighing 326 kg? The density of ice is only 920 kg/m³.
Independent variable
Separate the variable x1 and move all members of the mathematical notation: (2 x1+x2+x3)=3y+z to the other side.
Tank volume surface
The welded sheet metal tub is shaped a prism with dimensions of 6x2x2 m. How many m³ of water can fit in it, and what is its surface?
Car motorcycle meeting
The distance is 77 km. A car at 100 km/h and a motorcycle at 80 km/h will run against him for half an hour. Later. When will they meet?
Circular park
The circular park has an area of 1600 m². Cross the park, right in its center, leads the trail. What is the length of the trail?
Number ratio sum
The two natural numbers are in the ratio of 3:13, and we will denote their sum. Which of the following values cannot its sum be? a) 64 b) 96 c) 112 d) 39
Gear chain length
A chain was stretched between two identical gears with a diameter of 40 cm. The distance between the wheel centers is 1.8 m. Calculate the length of the chain. Procedure and calculation
The body
The body has 2 m, 2 dm, and 10 cm dimensions. It weighs 28 kg. What is the density?
Trip time shortening
A passenger car traveled the route from Trencin to Ruzomberok in 1 hour and 48 minutes. These two cities are 144 km apart. How many minutes would the driver shorten his return trip if he traveled an average of 90 km per hour?
Rectangular garden
The rectangular garden has a length of 48.7 m and a width of 6.3 meters shorter than the length. How much mesh should be bought for its fencing if the gate is 2.9 m long and the gate 1.1 m? What is the area of the garden?
Cube edges
The cube has an edge of 4 cm. It has the same volume as a block, the base of which has an area of 32 cm². What height is the block?
Road roller calculation
The road roller has a base diameter of 1.2 m and a length of 180 cm. a) how many times did he turn on the road when he walked 2 km during work? b) what is the largest area it can cover if it turns 1000 times? c) how many kilometers will he travel if he co

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