Expression of a variable from the formula - practice for 13 year olds - page 19 of 60
Number of problems found: 1183
- Surface and volume - cube
Find the surface and volume of a cube whose wall diagonal is 5 cm long. - Metal washers
Metal washers with a diameter of 80 mm are cut from a strip of steel sheet with a width of 10 cm and a length of 2 m. When two adjacent circles meet, calculate the material waste percentage if no material is lost. - Circumference 40401
Calculate the diameter of a circle whose area in cm² and the circumference in cm are expressed by the same number. - The quotient 2
The quotient of the quantity k minus 10 and m.
- The volume
The volume of the cone is 94.2 dm³, and the radius of the base is 6 dm. Calculate the surface of the cone. - Perpendicular 40203
In a right triangle, one perpendicular is 5 cm longer than the other perpendicular. The diaphragm is 150 mm. Calculate the lengths of the hangings. - Graduates 40111
As many as 62.5% of residents at the business academy graduated with honors. How many high school graduates were there if 30 students graduated with honors? - Calculate 40091
Calculate the size of the cube edge if the diagonal of the wall is 8 cm. - Simultaneously 39941
The reservoir is filled with a large pump in 20 hours, a medium in 24 hours, and a small one in 30 hours. How many hours will it be filled if all pumps are switched on simultaneously?
- Truncated pyramid
Find the volume and surface area of a regular quadrilateral truncated pyramid if base lengths a1 = 17 cm, a2 = 5 cm, and height v = 8 cm. - Percentage 39403
Romeo is 20% taller than Juliet. What percentage is Julie lower than Romeo, who measures 180 cm? - What is
What is the height of a cylinder whose surface size is 602.88 cm² and the area of its shell is 376.8 cm²? - Škoda cars
At 8:30 AM, Škoda 120 started from Prievidza at 60 km/h in the direction of Bratislava. At 9:00, started from Prievidza in the same direction as Škoda Rapid at 90 km/h. Where and when will Škoda Rapid catch up with Skoda 120? - Bratislava 39211
A bus left Žilina towards Bratislava at 9:00 a.m. at an average speed of 60 km/h. After a certain time, a Škoda Superb set off from Žilina in the same direction at a speed of 100 km/h and overtook the bus after 45 minutes. When did Škoda leave Žilina?
- Students 39121
N boys go to class. There are 13 more girls. Today 4 girls and five boys are missing. How many students in this class are in school today? - Gravitational 38843
An aluminum plate with a volume of 200 cm³ sinks in water. Determine the gravitational force exerted by the Earth on the plate. Determine the buoyant force that acts on a plate immersed in water. Compare the magnitudes of these forces and justify whether - Pentagonal pyramid
The height of a regular pentagonal pyramid is as long as the edge of the base, 20 cm. Calculate the volume and surface area of the pyramid. - Right isosceles triangle
What can be the area of a right isosceles triangle with a side length of 8 cm? - Headphones
Charlie is saving money to buy a pair of headphones for $225. He has $37 so far, and he can save $15 per week. In how many weeks will he have enough money to buy the headphones?
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Expression of a variable from the formula - math word problems. Maths practice for 13 year olds.