Maths practice for 14 year olds - page 148 of 361
Number of problems found: 7214
- Garden G
The rectangular, trapezoidal garden has a base length of 81 m, 76 m, and a vertical arm of 12 m. Calculate how many m² of the area will remain for planting greenery if 1/3 of the area is built. Calculate the consumption of mesh for land fencing. - Determine
Determine which type of quadrilateral ABCD is and find its perimeter if you know the coordinates of vertices: A/2,4 /, B / -2,1 /, C / -2, -2 /, D/2, -5 /. - Circle length center
Calculate the circle's length and determine the coordinates of the center of the circle when given its diameter XY, X / -3.2 / and Y / -3, -4 /. - Square circle length
Calculate the length of the circle, which is surrounded by a square with a side length of 3 cm - Electric motors
1. What frequency does the electrical distribution network in Europe have? 2. Write what revolutions a synchronous motor with three pole shoes should have? 3. By what device would you increase or decrease the revolutions of an electric motor? 4. Write why
- Bread loaf
In the bakery, they prepared 616 loaves of two types of bread for the expedition: sunflower bread weighing three-quarters of a kilogram and caraway bread 900 g each. They prepared 7 kg of more than half a ton of bread. How many caraway and sunflower loave - Car deceleration
The car is traveling at a speed of 54 km/hour. The driver starts braking with an acceleration (deceleration) of 3 m/s². Specify the time in which to stop. - Suitcase weight
What was the suitcase's weight if I lifted it to a height of 150 cm and did the work 0.5 kJ? - Stroller pushing distance
Mom did a 5 kJ job pushing the stroller. She always pushed him on the plane with a force of 50 N. How far did she push the stroller? - Crane work
The crane lifted a concrete block weighing 3 tons to a height of 500 cm. What work did it do? - Resident distance speed
Two of its inhabitants stand at one point in the land of two-dimensional beings. Suddenly, they both start running at the same moment. Resident A runs north at 5 m/s, and resident B runs east at 12 m/s. Calculate how fast they are moving away from each ot - Right triangle
A circle with a radius of 5 cm is described in a right triangle with a 6 cm leg. What is the height at the hypotenuse of this triangle? - Candy distribution
Adela and Barbora have a total of 34 candies. If Barbora gives Adela 2 candies, they will have the same. How many candies does Adela have, and how many Barbora? - Original price
Find the original price of a car if it was firstly increased by 4% and then reduced by 2%. It now costs CZK 326,144. - Truck kinetic energy
A truck has a mass of 4.5 tonnes and is moving at a constant speed of 72 km/h. What is its kinetic energy? - Box wrapping cost
How much will we pay for wrapping 5 boxes in the shape of a cube with a side length of 80 cm if we count on a margin of 35% for folds? The price for 1 square meter of paper is €2.55. You can only buy whole square meters. - Calculate pyramid
Calculate the volume of the pyramid, whose base edge a = 8 cm and the sidewall makes an angle α = 60° with the square base. - The cone - S,V
Calculate the volume and surface area of the cone if its radius r = 6 cm and side s = 10 cm. - Bracelet
The silver bracelet weighs 62 g and contains 59 g of silver. What is the purity of the bracelet? - Cone volume surface
A right triangle with perpendiculars a = 3 cm and b = 4 cm rotates around a longer perpendicular. Calculate the volume and surface area of the resulting cone.
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