Maths practice for 12-year-olds - page 234 of 347

Number of problems found: 6923

Tank Weight Pressure Ground
The tank's weight is 36 t, and the total contact area of the belts with the ground is 4 square meters. What pressure does the tank cause on a horizontal surface?
Thomas
Thomas lives 400 meters away from Sam, Rob from Thomas also 400 m, and Sam from Rob 500. Anthony lives 300 meters away from Rob, further than Sam. How far away lives Anthony from Rob?
Glass Paperweight Weight
The glass paperweight has the face of a sphere with a radius of 4 cm. Estimate and then calculate its weight. The density of glass is approximately 3800 kg/m³.
Hours 3
How many hours are in 3 2/3 days?
The rainwater
The rainwater container has the shape of a block whose bottom has dimensions of 4.5 m and 3.5 m. It is partially filled with water. What is the level if there is 189 hl of water in it?
Basen
How many square meters of tiles do we need to tile the walls and floor of the pool, 15 meters long, six meters wide, and two meters deep?
Buy Six Pay Four
There was an offer for item B: If you take six pieces, you only pay for four. One piece of this product costs 7 euros. Maria took 31 pieces of this product to her basket. How many euros did she pay for this item?
Employees Language Course Proportion
There are 600 employees in a certain company. Last year, three-fifths of them took a language course. This year, the number of employees with the course increased by 40. What proportion of the employees now has a language course?
Wheel Travel Distance
How many m did a wheel with a diameter of 22 dm pass if it stopped after 30 turns?
Circular Sidewalk Area
A sidewalk is 70 cm wide around the circular law and has a radius of 2.3 m. How many square meters does the sidewalk have?
Triangular RT prism
Calculate the volume and surface of a triangular prism whose base is a right triangle with sides a = 3 m, b = ha = 4 m, and c = 5 m. The height of the prism is v = 5.5 m.
Additional Workers Needed
Certain work was to be done by 21 workers during an eight-hour workday, due in 12 days. After five days, temporary workers came to their aid. They all worked together for 7 hours a day and finished the job in 6 days. How many part-timers were there?
Unknown number
Find a number that is by eight larger than its third.
Volcano
The volcano's crater is approximately in the shape of a cone with a base of 3.1416 square miles. The crater's depth is 1500 ft. How many cubic yards of earth would be required to fill this cavity?
Cube cutting
We cut identical cubes with an edge length of 2 cm from two corners from a wooden cube with an edge of 0.6 decimetres. How many cubes with an edge length of 2 cm can still be cut from a wooden cube?
Trapezoid - sides
Calculate the unknown side and the area of the ABCD trapezoid if you know: side a = 7.5 side b = 3.6 side d = 4.4 height v = 3.4 circumference o = 19 c =? S =?
Circular arc
Calculate the length of the circular arc if the diameter d = 20 cm and the angle alpha = 142 °
Tablecloth Border Length
For a round table with a diameter of 75 cm, you need to sew a tablecloth that should extend 10 cm around the table. A 1.5 cm slat is added to the border. How many square meters of lath do we need for this table?
Two brothers
The two brothers were to be divided according to the will of land at an area of 1ha 86a 30 m² in a ratio of 5:4. How many will everyone get?
Granite sidewalk
On the sidewalk, 3 m wide and 8 m long, 2 m³ of mosaic stone (granite cubes) was used. The master of tiles had to pave the sidewalk 2.5 m wide and 65 m long. How much m³ of the stone does it consume?

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