Maths practice for 12-year-olds - page 195 of 355

Number of problems found: 7083

Profitable company
Three businessmen decide to open up their own company. They agree to distribute the yearly profits made in the same ratio as their initial investments. They invest R 50 000, R 75 000, and R25 000, respectively. The profit made by the company in the first
Marlon
Marlon drew a scale drawing of a summer camp. In real life, the sand volleyball court is 8 meters wide. It is 4 centimeters wide in the picture. What is the drawing's scale factor? Simplify your answer and write it as a ratio, using a colon.
Pipe water flow
100hl of water flows out of the tank through three pipes in 8 hours. How many hectoliters of water flow through four pipes in 10 hours?
The bakery
The bakery baked 325 cakes from 25kg flour. How many kilograms of flour do they need to bake 195 pieces of such cakes?
Tank filling calculation
Five 1800hl filling pumps in 3 hours for how long does a 4hl filling 1800hl tank?
Half-filled
A cylindrical pot with a diameter of 24 cm is half-filled with water. How many centimeters will the level rise if we add a liter of water to it?
Altitude difference
What is a climb permillage of the hill that is 4 km long and has an altitude difference of 6 meters?
Perimeters
A rectangle has a perimeter of 16p centimeters. It had a width of 2p centimeters. Each side of an equilateral triangle is 1/2 the length of the rectangle. Find the total perimeter of the rectangle and the triangle if p=8.
Sugar ratio change
Change ten packages of vanilla sugar, in a ratio of 3:2, in a ratio of 4:5, in a ratio of 2:3, in a ratio of 7:5
Triangle circumference calculation
The sides of the triangle are in a ratio of 3:4:6. One side of it measures 21 cm. Calculate its circumference.
Magnitude of angle
What magnitude has an obtuse angle enclosed by the hands of clocks at 12:20 hours?
Wax candles
A company makes wax candles in the shape of a cylinder. Each candle has a diameter of 4 inches and a height of 7 inches. If the company used 7561.12 in³ of wax, how many candles did it make? Use 3.14, and do not round your answer.
Height of the cylinder
The cylinder volume is 150 dm cubic. The base diameter is 100 cm. What is the height of the cylinder?
Container with water
The cube-shaped container is filled with water to half its height. If we add 20 liters of water, the company will fill the container to three-quarters of its height. What is the volume of the whole container?
ATM withdrawal calculation
The ATM had 33250 euros on Monday. 10/25 was withdrawn from it on Tuesday, and 2/5 was withdrawn from the same ATM on Wednesday. How many did they pick on Tuesday, and how many on Wednesday? How many euros remained in the ATM?
Ball shot calculation
How many ball shots with diameters of 2 mm can be made of 1 kg of special metal alloy with a density of r = 7550 kg/m³?
Father and daughter
The father is 36 years old; the daughter is 20 years younger. What will be the ratio between them if they are ten years older?
Ages
The father is 36 years old, and his daughter is four years old. Write down the ratio of the age of the father and daughter. In what ratio will the ages of father and daughter be after four years?
Age ratio
Janko is 14 years old. The age ratio of Janka and Zuzka is 2:3. What was the ratio seven years ago?
Sprinter speed calculation
The sprinter ran 101 meters in 10 seconds. At what speed in km/h did he run?

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