![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
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
If the height is reduced by 2 cm, the surface area will be reduced by 64 square cm
64 △ 2 = 32 cm (32 cm is the perimeter of a square)
32 △ 4 = 8 cm (8 cm is the side length of a square)
8x8x2 = 128 CC (reduced volume)
The bottom edge of a rectangle is a square with a side length of 7 cm. Its side area is 500 square meters. How many cubic centimeters is the volume of this rectangle
fast
Height = 500 △ 4 △ 7 = 125 / 7 cm
Volume = 125 / 7 × 7 × 7 = 875 CC
The bottom of a cuboid is a square with a circumference of 16 decimeters. Its surface area is 96 square decimeters. What is the volume of the cuboid?
The length of the bottom side is 16 △ 4 = 4 (DM)
Its height is (96-4 × 4 × 2) / (4 × 4) = 4 (DM)
Its volume is: 4 × 4 × 4 = 64 (cubic decimeter)
The square in the picture is a pool, and the rest is a lawn. It is known that the square has an area of 300 square meters. How many square meters is the lawn?
This is a circle. There is a square in the lower left corner. The square is the pool. The other three fourths of the square is the lawn. One corner of the square has exceeded the circle. The area of the square is 300, and the area of the remaining part is calculated
But the square has an area of 300 instead of a side length of 300
I lost my Xie,
Because the side length of a square is the radius of a circle
Square area = side length × side length = radius × radius = 300 square meters, multiply by 3.14 is not the circle area!
The area of the circle is 3.14 × 300 = 942 square meters
Lawn area: 942 × 3 / 4 = 706.5 (M2)
As shown in the figure, the square part is a pool, and the rest is lawn. The square area is 300m2. What is the area of lawn?
The area of the circle is: 3.14 × 300 = 942 (square meters), the area of the blank part in the circle is: 14 × 942 = 235.5 (square meters), the area of the lawn part is: 942-235.5 = 706.5 (square meters). Answer: the area of the lawn part is 706.5 square meters
Square flower bed area is 225 square meters, how much is its side length
The area of a square flower bed is 225 square meters. What is the side length?
15 meters
In the middle of the figure below is a square flower bed with a side length of 18m. There is a 2m path around the flower bed. How many square meters is the area of the path
"There is a 2 m path around the flower bed" means that the width is 2 M. if so, the formula is as follows:
（18/4+2*2）*
（18/4+2*2）*
=72.25
A circle and a rectangle have the same area, the radius of the circle is 5cm, the width of the rectangle is 4cm, and the length is () cm
Divide the area of a circle by the width of a rectangle
5*5π/4=25/4*π
The perimeter of a rectangle and a circle are equal. It is known that the length of a rectangle is 10 cm and the width is 5 cm. What is the area of a circle?
2 r = (10 + 5) * 2
R = 15 / pie
Area = square of pie * r = 225
RELATED INFORMATIONS
- 1. 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,
- 2. 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
- 3. The perimeter of the bottom of a cube is 16 cm, and its surface area is______ Square centimeter, the volume is______ Cubic centimeter
- 4. As shown in the figure, the area of a triangle is twice that of a square, less than 3 cubic centimeters
- 5. 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
- 6. 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?
- 7. 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?
- 8. 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?
- 9. What is the volume of a cube with a surface area of 54 square centimeters?
- 10. The surface area of a cube is 54. How many square centimeters is its bottom area and how many cubic centimeters is its volume
- 11. 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?
- 12. 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．
- 13. 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?
- 14. 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
- 15. 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?
- 16. 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?
- 17. Use 60 decimeter long wire to form a rectangle. The ratio of length to width of the rectangle is 3:2. What's its area?
- 18. Use a 40 cm long wire to form a rectangle. What's the area of the rectangle?
- 19. A piece of iron wire is 24 meters long. It should be enclosed into a rectangle. The length is 1.4 times the width. The area of this rectangle is () square meters?
- 20. A wire is surrounded by a circle with a diameter of 4cm. If it is surrounded by a rectangle, the length of the rectangle is 6cm, then the width of the rectangle is () cm Urgent! According to the sentence "the width of a rectangle is the radius of a circle" in the book, I am right! Asked the teacher only said that this circle has two diameters! What's the matter There are three options A2CM B0．56CM C0．28CM I choose a, but the teacher said to choose C, what's the matter?