Maths practice for 11-year-olds. - page 105 of 226

Number of problems found: 4508

Aquarium water calculation
The aquarium has a bottom in the shape of a square a = 8 dm. How many liters of water flowed into it if its level rose by 10 cm?
Prism shelf space
The surface of the triangular prism is 157.2 dm². Its shell has an area of 126 dm². What space will it occupy on a shelf placed on a pedestal?
Commemorative coins
On the 200th anniversary of the birth of Ľudovít Štúr, the National Bank of Slovakia issued a commemorative two-euro coin in 2015, the diameter of which is 25.75 mm. The nickel-brass center is approximately 18 millimeters in diameter; the rest of the coin
Container paint cost
How many crowns will the paint cost to paint a cylindrical container (d = 4.2 m, h = 5.5 m) when about 5 m² of paint is painted from 1 kg of color, and 1 kg of paint costs 115 CZK?
Two ribbons
The total length of the two ribbons is 13 meters. If one ribbon is 7 and 5/8 meters long, what is the length of the other ribbon?
Games
Jack and Paul decided to play chess against each other. They bet ten pesos on each game they played. Jack won three bets, and Paul won fifty pesos. How many games did they play?
Outdoor temperature
The outdoor temperature was 8 degrees at midnight. The temperature declined 5 degrees during each of the next 3 hours. What was the temperature at 3 AM?
Four prisms
Question No. 1: The prism has the dimensions a = 2.5 cm, b = 100 mm, c = 12 cm. What is its volume? a) 3000 cm² b) 300 cm² c) 3000 cm³ d) 300 cm³ Question No.2: The prism base is a rhombus with a side length of 30 cm and a height of 27 cm. The height of t
Mixing paint with water
Mr. Adamek will paint. The purchased paint is diluted with water in a ratio of 1:1.5. a) how many parts of water will add to 1 part of the paint b) how many liters of water the mission adds to 2 liters of paint
Village's tourists
At 8 o'clock, Pete went from Hůrka to Lhotka at a speed of 3 km/h, and at 9 o'clock, Tony went from Lhotka to Hůrka at a rate of 5 km/h. How far apart are the two villages if Pete and Tony meet at 9:30 am?
Two walls
Calculate the surface area of a cube in m² if you know that the area of its two walls is 72 dm².
Can sheet calculation
Can, height 9 cm, r = 8 cm. How much sheet is needed to make it?
Rectangular flowerbed
The park has a rectangular flowerbed measuring 10 m and 200 cm. How many rose bushes do we plant in the flowerbed if 25 dm² are needed per bush?
Nou camp
Nou camp is the largest football stadium in Europe with a capacity of 99 354 places. It has built several dozen entrances. Half an hour before the start of the sold-out match there were already 30 906 fans in the stands. Through each of the 31 entrances,
Silo painting calculation
The cylindrical silo has a diameter of 4 m and a height of 7 m. For how many square meters is it necessary to buy paint to paint against corrosion (we paint the silo only from the outside)?
Filling the pool
How many liters of water must be poured into a pool 25 m long, 800 cm wide, and 20 m deep? The pool should be filled to 3/4 of its depth. How many euros will you pay for pool tiling, and a square meter of tiling costs 20 euros?
Cylinder container
The cylindrical container with a diameter of 1.8 m contains 2,000 liters of water. How high does the water reach?
Cylinder surface calculation
Calculate the surface of the paper cylinder (without lid), which has the following dimensions: bottom radius: 7 cm, cylinder height: 22 cm.
Difference of temperatures
The temperature on Saturday was –2 °C. The temperature on Sunday was 8 °C. Write down the difference between these two temperatures.
Plane dusting distance
The plane dusted the field in 25 minutes at 252 km/h. How many kilometers has it flown?

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