Maths practice for 12-year-olds - page 43 of 354
Number of problems found: 7066
- Diameter 132
The base diameter of a cylinder is 2 m and its total surface area is 34.54 m². Calculate the base radius, height, and volume of the cylinder. - Garden 3
A garden pool in the shape of a cylinder with a base diameter of 300 cm contains 25 hectolitres of water. How deep is it if the water level is 10 cm below the rim of the pool? - Volume 102
The volume of a cylinder is 214 cm³ and the base radius is 4 cm. Calculate the height of the cylinder. - Drinking trough
A drinking trough for cattle is in the shape of a half-cylinder, 2 metres long with a diameter of 80 cm. How much sheet metal is needed to make it, given that an additional 12% of material is added for joints? - Garden fencing
How much will decorative fencing cost if the garden measures 350 m × 260 m and 1 metre of fencing costs 450 CZK? - Advantageous internet
We had long been using internet from Company A at €17.49 per month after the contract period. We switched to internet from Company B at €11.39 per month, with the condition that a fee of €48.38 is paid in the first month, which includes the installation. - Pirates
Pirates captured 1 tonne of gold and hid it in 25 barrels. How many more barrels would the pirates need if they transported only 25 kg of gold in each barrel? - At Junior's
A pizzeria offers pizza with tomato and cheese as a base. If a customer wishes, they may add toppings from the following options: ham, mushrooms, corn, and onion, each ingredient at most once. Every pizza is available in three sizes: small, medium, and la - Electrical 11
An electrical device produces 4.2 MJ of work per hour at an efficiency of 53%. What is the power input of this device? - Calculate 258
Calculate the volume and surface area of a prism with a trapezoidal base and a height of 9 cm. The base is an isosceles trapezoid with parallel sides of 3 cm and 6 cm, legs of 2.5 cm, and a height of 2 cm. - At night
On the night from Thursday to Friday, the temperature dropped to −7 °C. On Friday at noon, the temperature rose by 13 °C, and in the evening, the temperature dropped by 11 °C. What did the thermometer show on Friday evening? - In the middle 2
The number halfway between an unknown number and the number 30 is 12. Determine the unknown number. - From the intersection
From the intersection, the school is 6/5 km away, the shop 9/10 km, the bank 5/8 km, and the park 21/8 km. Which place is closest to the intersection? - Asphalt - rolling A road roller has a diameter of 80 cm and a width of 1.2 m. How many square metres of road does it roll if it makes twenty full rotations?
- Meat 5
2.4 kg of meat costs 292 CZK at the store. How much meat of the same type can be bought for 2,482 CZK? - Path 11
A path 1.5 metres wide is to be built around the perimeter of a square plot of land with a side of 28 metres. By how much will the total occupied area increase? - Solve R
Solve the equation with brackets: 5 × (2u − 9) − 8 × (0.5 − 3u) = 4 × (7u − 1) − 3 - Quarter of some number
A quarter of an unknown number, increased by one hundred, equals fifty. What is the unknown number? - Triangle ABP
An isosceles trapezoid ABCD is given. The length of side AB is 10 cm, the length of CD is 7 cm, and the height drawn to side AB is 4 cm. Point P is the foot of the altitude from A to side AD. Calculate the area of triangle ABP. - Salad - delicacy
A customer paid €1.50 for 300 g of salad. How much will they pay for 500 g of the same salad?
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