Area - 8th grade (13y) - math problems
Number of problems found: 673
- Mysterious area
The trapezoid ABCD is given. Calculate its area if the area of the DBC triangle is 27 cm2.
The area of a 25 inch TV screen is 300 inch² the area of a 40 inch TV screen is 768 inch². The area of the smaller screen is what percent of the area of the larger screen?
- Area to perimeter
Calculate circle circumference if its area is 254.34cm2
- In the
In the national park, the ratio of the wooded area to grassland is 4: 1. The total area is 385km2. What area is wooded?
- Alaska vs Montana
Alaska is the largest state in the United States and has a surface area of approximately 588,000 square miles. Montana has a surface area that is approximately 25% of the surface area of Alaska. What is the approximate surface area of Montana?
- Cllub flag
The children had the club flag sewn on. The red color covered 2/20 of the total area of the flag, the blue area a fifth, the yellow 19% of the total area. What% is the green area occupied?
- Content area and percents
Determine what percentage is smaller cube surface, when the surface area of the wall decreases by 25%.
- Inscribed rectangle
The circle area is 216. Determine the area of inscribed rectangle with one side 5 long.
- Diagonal to area
Calculate the area of a rectangle in which the length of the diagonal is 10 cm.
- Cylinder surface area
Volume of a cylinder whose height is equal to the radius of the base is 678.5 dm3. Calculate its surface area.
- Volume from surface area
What is the volume of the cube whose surface area is 96 cm2?
- Surface area
The volume of a cone is 1000 cm3 and the content area of the axis cut is 100 cm2. Calculate the surface area of the cone.
- Maximum area of rhombus
Calculate the interior angles at which equilateral rhombus has a maximum area.
- Area to volume
If the surface area of a cube is 486, find its volume.
- Conical area
A right angled triangle has sides a=12 and b=19 in right angle. The hypotenuse is c. If the triangle rotates on the c side as axis, find the volume and surface area of conical area created by this rotation.
Forest has an area of 36 ha. How much area is occupied by forest on the map at scale 1:500?
- Cube walls
Find the volume and the surface area of the cube if the area of one of its walls is 40 cm2.
Area of circle inscribed in a square is 14. What is the area of a circle circumscribed around a square?
- Area of a cube
Calculate the surface area of a cube if its volume is equal to 729 cubic meters.
- Volume and area
What is the volume of a cube which has area of 361 cm2?
Area - math problems. Examples for 8th grade.