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As shown in the figure, the area of a triangle is twice that of a square, less than 3 cubic centimeters
Let the square area be x and the triangle be 2x-3
X+2X-3-10=70
3X-13=70
X = 83 / 3
The triangle is: 83 / 3 × 2-3 = 157 / 3
It has 10 small squares. What's its volume in cubic centimeter? What's its surface area in square centimeter?
How to answer your unclear narration
After cutting the 30 cm long cuboid into two pieces, as shown in the figure, the surface area increases by 24 square centimeters. What is the cuboid's volume in cubic centimeters
Can't let go of new things,
The sectional area is: 24 △ 2 = 12 (square centimeter)
Original volume: 12 × 30 = 360 (cm3)
If the length and width are prime numbers, its area is () square centimeter
2*(x+y)=50
x+y=25
Use a 16 cm long wire to form a rectangle. If the length and width are prime numbers, its area is () square centimeters
A. 6B. 8C. 15
The sum of length and width: 16 △ 2 = 8 (CM); because both length and width are prime numbers, the length is 5 cm and the width is 3 cm, the area of the rectangle is 5 × 3 = 15 (square cm); answer: the area of the rectangle is 15 square cm
Use a 16 cm long wire to form a rectangle. If the length and width are prime numbers, its area is () square centimeters
A. 6B. 8C. 15
The sum of length and width: 16 △ 2 = 8 (CM); because both length and width are prime numbers, the length is 5 cm and the width is 3 cm, the area of the rectangle is 5 × 3 = 15 (square cm); answer: the area of the rectangle is 15 square cm
Use a 16 cm long wire to form a rectangle. If the length and width are prime numbers, its area is () square centimeters
A. 6B. 8C. 15
The sum of length and width: 16 △ 2 = 8 (CM); because both length and width are prime numbers, the length is 5 cm and the width is 3 cm, the area of the rectangle is 5 × 3 = 15 (square cm); answer: the area of the rectangle is 15 square cm
If the length and width of a 60cm wire are prime numbers, its largest area is ()
13 times 17 = 221
Divide a 20cm long iron wire into two sections and circle each section into a square. If the difference between the two squares is 5cm2, calculate the length of the two sections
Suppose that the length of the larger section is xcm (x ≥ 10), then the length of the other section is (20-x) cm. Then the side lengths of two small squares are 14xcm and 14 (20-x) cm respectively ∵ the difference between the areas of the two squares is 5cm2, ■ (14x) 2 - [14 (20-x)] 2 = 5, and the solution is x = 12cm. Then the length of the other section is 20-12 = 8cm
A piece of iron wire can just form a square with a side length of 4dm. If this piece of iron wire is used to encircle a 6dm rectangle, how large is its area?
4 × 4 / 2-6, = 16 / 2-6, = 8-6, = 2 (decimeter), 8 × 2 = 16 (square decimeter); answer: its area is 16 square decimeter
RELATED INFORMATIONS
- 1. A cone has a volume of 36 cubic centimeters and a height of 6 centimeters. What is its bottom area? 2. The volume and bottom area of a cylinder and a cone are equal respectively. It is known that the height of the cylinder is 15 cm and the height of the cone is how many cm
- 2. The volume of cone a is 128 cubic centimeters, and the height is 12 centimeters. The bottom area of cone B and cone a is equal, and the height is 9 centimeters. What is the volume of cone B?
- 3. The volume of a cylinder is 18 cubic centimeters more than that of a cone with the same base and height. How many cubic centimeters is the volume of a cone?
- 4. The bottom area and height of a cylinder and a cone are equal. The volume of a cone is 36 cubic centimeters less than that of a cylinder. What is the volume of a cylinder?
- 5. What is the volume of a cube with a surface area of 54 square centimeters?
- 6. The surface area of a cube is 54. How many square centimeters is its bottom area and how many cubic centimeters is its volume
- 7. A cube with a surface area of 96 square centimeters has a volume of several cubic centimeters
- 8. The surface area of a cuboid with a square cross section is 114 square centimeters. The largest cuboid is cut off and the surface area is 54 square centimeters, How much square centimeter has been subtracted from the surface area of the truncated cube wood?
- 9. The surface area of a cube is 54 square centimeters, and the area of one side () square centimeters?
- 10. If a cuboid is reduced by 2 cm, it will become a cube. It is known that the surface area of a cube is 54 square cm. Find the volume of the cuboid I know that the square of 9 is 3, but the primary school students have not yet learned. The energy length of a scholar's Cube: 54 / 6 / 3 = 3cm, why divide by 3,
- 11. The perimeter of the bottom of a cube is 16 cm, and its surface area is______ Square centimeter, the volume is______ Cubic centimeter
- 12. There are two cylinders with equal base area. The height of the first cylinder is 4 / 7 of that of the second. The volume of the first cylinder is 24 cubic centimeters There are two cylinders with the same base area. The height of the first cylinder is 4 / 7 of that of the second cylinder. The volume of the first cylinder is 24 cubic centimeters. How many cubic centimeters more is the volume of the second cylinder than that of the first cylinder? Ask this type of questions to explain~ Give me more math problems
- 13. One is just cut into two squares, and the surface area increases by 32 square centimeters. How many cubic centimeters is the volume of this rectangle? Come on,
- 14. A rectangle with a square bottom surface, if the height is reduced by 2 cm, then the surface area will be reduced by 64 square cm. How much cubic cm is the volume reduced? Every step is best written clearly
- 15. Xiao Li wants to use a square piece of paper with an area of 900 square meters to cut a rectangular piece of paper with an area of 800 square meters along the direction of the side, so that the ratio of length to width is 5:4. I don't know if it can be cut out, but I'm worried. Xiao Ming sees it and says, "don't worry, You must be able to use a large piece of paper to cut a small piece of paper. "Do you agree with Xiao Ming? Can Xiao Li use this piece of paper to cut a piece of paper that meets the requirements?
- 16. If you want to cut a rectangular iron sheet with an area of 150cm2 so that its length is 5cm more than its width, the length of the rectangle is______ Cm in width______ cm．
- 17. Use a 54 cm long wire to form a rectangle. If the length is twice the width, what is the length and width of the rectangle? What's the area?
- 18. ① What is the area ratio of a square to a circle if the perimeter of a square and a circle are equal? ② If the area of a square is 314 square centimeters, the area of a circle is______ Square centimeter
- 19. A 128 cm long iron wire is enclosed into a rectangle according to the ratio of length to width of 5:3. How many square centimeters is the area of the rectangle?
- 20. Circle the 128 cm wire into a rectangle so that the length is 18 cm more than the width. How many cm are the length and width?