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A rectangular sheet of iron, 30 cm long and 25 cm wide. Cut a square with a side length of 5 cm from four corners to make a box. Calculate the volume of the box I'm in a hurry
(30-5 * 2) * (25-5 * 2) * 5 = 1500 cc
Cut off the four corners of a square sheet of iron with a side length of 30 cm and a square with a side length of 5 cm, then fold it into an open box and calculate its volume and surface area
Wrong. Don't blame me. The volume is 2000 cm3 and the surface area is 800 cm2
The perimeter of a square is 48 meters. If we expand its perimeter to 60 meters, how many square meters will the new square increase
The original perimeter is 48m, so the side length is 48 / 4 = 12m
The original area is 12 * 12 = 144 square meters
Now the perimeter is 60m, so the side length is 60 / 4 = 15m
The current area is 15 * 15 = 225 square meters
The increased area is 225-144 = 81 square meters
Enough details,
You can ask me questions about mathematics, history and physics in the future
A square with an area of 25 square meters is ()
A. 20 square meters B. 20 meters C. 25 meters
Because 5 × 5 = 25 (square meters), the side length of the square is 5 meters, 5 × 4 = 20 (meters). A: the perimeter of the square is 20 meters
What is the perimeter of a square with an area of 64 square meters
32 meters
A square has an area of 16 square centimeters and a perimeter of 16 centimeters. Its area is as big as its perimeter. Right? Why?
That's not right. Because one is the unit of area and the other is the unit of length
The perimeter of a square is 17 / 16. How many square meters is the area
17 / 16 divided by 4 = 17 / 64
17 / 64 * 17 / 64 = 289 / 4096 M2
The perimeter of a square is 16 decimeters. If its side length is doubled, then its perimeter is 16 decimeters______ Decimeter, area is______ Square decimeter
16 △ 4 = 4 (decimeter) 4 × 2 = 8 (decimeter) 8 × 4 = 32 (decimeter) 8 × 8 = 64 (square decimeter)
A farmer dug a new round pool, the perimeter of the pool is 50.24 meters, how many square meters is the area of the pool?
It is known that C = 50.24m, r = C ﹣ 2 ﹣ π = 50.24 ﹣ 2 ﹣ 3.14 = 8 (m); s = π R2 = 3.14 × 82 = 3.14 × 64, = 200.96 (M2); a: this round pool covers an area of 200.96 square meters
The perimeter of a round lawn is 50.24 meters. How many square meters does this lawn cover?
Radius = 50.24 ﹣ 2 ﹣ 3.14 = 8m, area = 3.14 × 8 × 8 = 200.96m2 ~ Yike forever 523 answers for you, I wish you progress in your study ~ ~ ~ if you agree with my answer, please click the [adopt as satisfactory answer] button in time ~ ~ the mobile phone questioner can comment "satisfied" at the top right corner of the client. ~ your adoption is my driving force ~ ~ ~ if you have any new questions, please ask me for help, the answer is not easy, Please understand~~
RELATED INFORMATIONS
- 1. Cut a small square with a side length of 4cm at the four corners of the square iron sheet to make a box without cover, with a surface area of 400cm2. Calculate the side length of the original iron sheet
- 2. A square sheet of iron, four corners cut off four small squares, folded into a bottom side length of 40cm uncovered cuboid box, its volume is 24000cm3______ cm．
- 3. A rectangular cardboard, 10 cm long, 8 cm wide, four corners each cut out a side length of 2 cm square, folded into an open box, its volume A rectangular sheet of iron, 10 cm in length and 8 cm in width, with four corners each cut off, is a square box with a side length of 2 cm [Note: it's a cube! Not a square]. What's the volume of the box? How big is the sheet of iron?
- 4. A 20 cm long, 16 cm wide rectangular sheet iron, four corners of each cut off the length of 4cm small square, make a no cover box. Find the volume of the box It's due tomorrow
- 5. Cut off the square of 10 cm in length at the four corners of a rectangular piece of iron which is twice the length and width, and then fold up the four sides to make a box without a cover His volume is 4000cm square, and the length and width of the rectangular iron sheet are calculated
- 6. There is a rectangular sheet of iron 16 cm wide, which is welded into an open box after subtracting the square with side length of 4 cm from the four corners. The known volume of the box is 76 M & sup3;, what is the original area of this sheet
- 7. There is a rectangular cardboard 8 cm in length and 4 cm in width. A square is cut from each corner and folded into a rectangular paperless box 1 cm in height What is the volume of the box in cubic centimeter?
- 8. The side length of a square cardboard is 1 meter. Cut off the four corners of it by 2 decimeters. Then fold it into an open cardboard box and calculate the volume of the box
- 9. A rectangular iron sheet is welded into a box without cover by subtracting the square with the side length of 4cm from its four corners. The surface area and volume of the box are 20cm wide and 50cm long
- 10. There is a piece of hard paper 20 cm in length and 12 cm in width. Cut a square 2 cm in length at each corner, and then fold it into a cuboid paperless box. The volume of the box is______ Cm
- 11. It is necessary to prepare () kinds of rectangles of different sizes, the largest of which is 10 cm in length, 8 cm in width and 6 cm in height The largest rectangle area is () square centimeter, and the smallest rectangle area is () square centimeter
- 12. The bottom is a square cuboid carton. Unfold its side to get a square with a side length of 20 cm. How much cardboard does this cuboid carton need at least
- 13. How much cardboard is needed to make 10 rectangular cartons with 81 square centimeter bottom area and 6 centimeter height
- 14. A rectangular cardboard box, 10 cm long, 6 cm wide, 5 cm high, 1 square meter cardboard, how many cardboard boxes can be made? (excluding interfaces)
- 15. A rectangular cardboard box, 10 cm long, 6 cm wide, 5 cm high, has 210 pieces of cardboard of 2 square meters, how many cartons can be made
- 16. A 30 cm long, 20 cm wide rectangular cardboard, cut off the four corners of the small square, you can make a carton without cover, please calculate, how much cubic centimeter is the volume of this carton? What's the surface area?
- 17. A rectangular iron plate is 20 cm long and 14 cm wide. In this way, the cube with a side length of 2 cm is cut off from the four corners, and then it is made into a lidless zygote. What is the volume of this box
- 18. There is a 18cm wide rectangular iron plate. After cutting the square with 4cm side length at the four corners, it is welded into an iron box without feeding. The known volume of the iron box is 760 cubic cm How many square centimeters is the original iron plate area?
- 19. A 30 cm long, 20 cm wide rectangular cardboard four corners to a side length of 5 cm cube, and then fold along the dotted line into a cuboid What's the volume in cubic centimeters?
- 20. A square iron sheet, four corners, cut off four small squares of the same size, and fold them into a cuboid box with a bottom side length of 50 cm and a volume of 45000 cubic cm. Find out the side length of the original square iron sheet. (use equation solution)