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The perimeter of a rectangle is 48 meters, and the ratio of length to width is 2; 1
Perimeter = (length + width) × 2 = 48
Length + width = 24
The ratio of length to width is 2; 1
So length = 24 △ 3 × 2 = 16, width = 24-16 = 8
Area = length × width = 16 × 8 = 128
The perimeter of a rectangle is 84 meters, and the ratio of length to width is 5:2?
84÷2=42
42x 5/7=30
42x 2/7=12
Sixth grade students line up to do radio exercises. The number of people in each line is proportional to the number of lines______ When the oil yield is constant, the quality of peanut oil is equal to that of peanut______ Proportion
① The number of people in each row × the number of rows = the total number of people (a certain number), which is the product of a certain number, and the number of people in each row is inversely proportional to the number of rows; ② the quality of peanut oil △ the quality of peanut = the oil yield (a certain number), which is a certain ratio, and the quality of peanut oil is positively proportional to the quality of peanut; so the answer is: negative, positive
The circumference of a rectangle is 360 meters, and its length is four times of its width. How many meters are the length and width of the rectangle?
Suppose the width of a rectangle is x meters, then the length is 4x meters. According to the meaning of the title, we can get the equation: (x + 4x) × 2 = 360 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 10x = 360 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 3636 × 4 = 144 (meters) a: the length is 144 meters, and the width is 36 meters
RELATED INFORMATIONS
- 1. When the length and width of a rectangle are expanded three times at the same time, the perimeter is 72 cm. How many cm is the perimeter of the rectangle?
- 2. The circumference of a rectangle is 36 cm, and the length is 10 cm. The simplest integer ratio of length and width is______ ．
- 3. The circumference of a rectangle is 100 decimeters, of which the width is 10 decimeters less than the length What's the area of this rectangle?
- 4. If the length of a rectangle is 12cm and the diagonal length is 13cm, the perimeter of the rectangle is______ cm．
- 5. A rectangle is 5 / 3 decimeters long and 4 / 1 longer than its width. How many decimeters is the circumference of the rectangle (4 / 1 is 1 / 4, and so on)
- 6. Use four identical rectangles to make a square. The circumference of each rectangle is 50 cm. What is the square area? A formula
- 7. The perimeter of a square is 9 cm. Cut it into three rectangles of the same size. How long is the perimeter of each rectangle The perimeter of a square is 9 cm. Cut it into three rectangles of the same size. How many cm is the perimeter of each rectangle?
- 8. The perimeter of a rectangle is 96cm, and the ratio of length to width is 5:3. What is its area fast
- 9. Draw a rectangular piece of land with the ratio of length to width of 5:3 on the map with the scale of 1:500. What is the length of the land It's urgent!
- 10. If the length of a rectangle is increased by 2 cm, the width is increased by 4 cm, and the area is increased by 60 square cm, what is the original circumference of the rectangle? Sorry, the length and width are increased by 4cm at the same time! In order to apologize, the reward was increased to 100
- 11. The circumference of a rectangle is 24 meters, and its length is four times of its width. How many meters are the length and width of the rectangle? Use the equation to calculate
- 12. The perimeter of the rectangle is 19.4 meters. The length is 0.8 meters less than twice the width. How many meters are the length and width of the rectangle?
- 13. Divide a square with a perimeter of 8 decimeters into two identical rectangles, each of which has a rectangular area of______ Square decimeter, perimeter is______ Decimeter
- 14. Third grade mathematics problem: to give 8 meters long, 6 meters wide classroom floor tiles, there are two types of floor tiles: 40 cm square tiles and 60 cm long, 40 cm wide rectangular tiles?
- 15. A rectangular floor tile is 42 cm long and 26 cm wide. How many floor tiles does it need to make a square floor? Urgent need~
- 16. A cuboid swimming pool is 20 meters long, 15 meters wide and 2 meters deep. Now we need to put cement on each side of the swimming pool, and then paste ceramic tiles with a length of 4 decimeters. How many such tiles are needed? If 5 kg of cement is used per square meter, how much cement will be used?
- 17. A cuboid children's swimming pool is 40 meters long, 14 meters wide and 1.2 meters deep. How many pieces of square tiles with an area of 0.16 square meters need to be pasted on the four walls and the bottom of the pool?
- 18. The swimming pool of a school gymnasium is 50 meters long, 20 meters wide and 1.2 meters deep. How many tiles are needed to paste 0.16 square meters of tiles on the wall and bottom of the pool?
- 19. There is a rectangular living room, 6.4 meters long and 4 meters wide. It needs to lay 80 cm square floor tiles. How many floor tiles do you need? If each tile costs 35 yuan, how much does it cost?
- 20. How many centimeters is the diagonal of 80 cm square tile?