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Make a cuboid oil tank without cover with iron sheet. The bottom is a square with side length of 2 decimeters and the height is 1.5 meters. How much iron sheet do you need to make such an oil tank?
2 decimeters = 0.2 meters
0.2 * 0.2 + 0.2 * 1.5 * 4 = 1.24 (M2)
A: it takes 1.24 square meters of iron to make such a tank
Make a cuboid tank with iron sheet. The bottom is a cube with a side length of 50cm and the height is 80cm. At least how many square centimeters of iron sheet?
How many liters of gas can you hold at most?
(1) If the bottom area is 2 × 50 × 50 = 5000cm2 and the side area is 4 × 50 × 80 = 16000cm2, at least 5000 + 16000 = 21000cm2 iron sheet is required
(2) Volume = bottom area × height = 50 × 50 × 80 = 200000 CC = 200 L
Use iron sheet to make a cuboid oil tank without cover. It's 100cm long, 80cm wide and 40cm high. How much iron sheet does it need to make this oil tank
If each liter of oil weighs 0.8 kg, how many kg can this mailbox hold?
Urgent need
Surface area 100 × 80 + (100 × 40 + 80 × 40) × 2
=8000+14400
=22400 square centimeters
Volume of oil barrel: 100 × 80 × 40 = 320000 cubic centimeters
320000 CC = 320 cubic decimeter = 320 liter
320 × 0.8 = 256 kg
A cuboid tin oil tank is 80cm long, 50cm wide and 40cm high. How many square centimeters of tin should be used to make the oil tank? What is the capacity of the oil tank
How many liters is it
2 * (80 * 50) + 2 * (80 * 40) + 2 * (50 * 40) = 8000 + 6400 + 4000 = 16400 square centimeters
80 * 50 * 40 = 160000 CC = 0.16 L
A: it takes 16400 square centimeter iron sheet to make this oil tank. The volume of this oil tank is 0.16 liter
The total edge length of a cuboid is 124cm, and the circumference of its bottom surface is 40cm. What is the height of the cuboid?
Boss Z 1,
The sum of the length of the upper and lower edges is:
40 × 2 = 80 (CM)
The height of this cuboid is:
(124-80) △ 4 = 11 (CM)
The total edge length of a cuboid is 124cm, and the circumference of its bottom surface is 40cm. What is the height of the cuboid?
11cm
How many centimeters of wire do you need to make a rectangular frame with a circumference of 18 cm at the bottom and a height of 3 cm?
18+18+3*4=48
How many decimeters of wire do you need to make a rectangular frame with a bottom circumference of 18 decimeters and a height of 3 decimeters?
18×2+4×3
Because a cuboid has two bases, × 2 can find the perimeter of the top and bottom
The cuboid has 12 edges, 4 in length, 4 in width and 4 in height,
There are still four high wires left. Just use 4 × 3 to find the required wire length
At least () cm iron wire is needed to make a cuboid frame with bottom circumference of 18 cm and height of 3 cm
At least (48) cm wire is needed to make a cuboid frame with 18 cm perimeter and 3 cm height
4 × 3 + 2 × 18 = 48 cm
How many centimeters of wire is needed to make a rectangular frame with a circumference of 20 cm at the bottom and a height of 5 cm?
20*2+5*4=60cm
RELATED INFORMATIONS
- 1. You need at least () cm long wire to make a cuboid frame with a perimeter of 18 cm at the bottom and a height of 5 cm
- 2. There is a 24 cm long, 18 cm wide rectangular iron sheet, which is welded into a box without a cover by subtracting the square with a side length of 4 cm from the four corners, What's the surface area of this box
- 3. Choice: a rectangle is 12 cm long and 8 cm wide. If you cut a square with 2 cm side length around it, the perimeter of the figure will be left A. Decrease 16cm B, unchanged C, increase 16cm
- 4. Draw a quadrilateral with only one axis of symmetry, and then draw a quadrilateral with only two axes of symmetry
- 5. A rectangular cardboard, 1.6 decimeters long, 8 cm wide, cut diameter is 4 cm circle, how many can cut at most?
- 6. Three equal size squares, put together into a rectangle, the circumference of this rectangle is 24 cm, the side length of each square is 24 cm______ Centimeter. What's the area of this rectangle______ Square centimeter
- 7. How many pieces of rectangular iron pieces, 90cm long and 42cm wide, should be cut into square iron pieces with the same area and the same number of centimeters, if there is no surplus?
- 8. You want to cut the rectangular paper of 84 cm in length and 72 cm in width into a square paper of the same size to make a lantern. What is the maximum side length of this square paper without any remaining
- 9. 1. The surface area of a cube is 8.64 square decimeters, and the area of a surface is () 2. Weld a 36 cm long iron wire into a cube frame. Its edge length is () cm 3. The area of one side of a cube is 25 square centimeters, and the sum of its edges is () centimeters 4. A 48 cm long iron wire can be welded into a cuboid of 5 cm long, 4 cm wide and () cm high 5. After a cuboid block is cut into two pieces, the surface area increases by 12 square centimeters. What is the surface area of this cuboid?
- 10. The bottom area of a cube is 25 square decimeters, its surface area is (square decimeters), and its volume is () cubic meters
- 11. A rectangular piece of paper is 60 cm long. After cutting off the largest square, a small rectangle is left. What is the perimeter of this small rectangle?
- 12. A cuboid is 26 cm high. It is cut into two cuboids horizontally. The surface area is increased by 80 square cm
- 13. A rectangular sheet of iron, 26 cm in length and 16 cm in width, is cut off from its four corners. The square with a side length of 3 cm is then welded into an open iron box. How many ml is the volume of this iron box?
- 14. A coin with a radius of 1cm rolls along the edge of the triangle cardboard. The three sides of the triangle are 6cm, 7cm and 8cm respectively. When the coin rolls back to its original position, what is the distance of the center of the coin
- 15. Cut a piece of rectangular paper 120 cm long and 80 cm wide into a square of the same size and as large as possible. There is no paper left. At least how many pieces can be cut? Please list
- 16. Use three 15 cm square to make a rectangle and find the perimeter of the rectangle
- 17. The sum of the side length of a square and the width of a rectangle is 20 cm, the perimeter of a square is one third of the perimeter of a rectangle, the width of a rectangle is 4 / 5 of the length, and the sum of the area of a rectangle and a square is how many square centimeters?
- 18. It is known that the edge length of the first cube carton is 6cm, and the volume of the second cube carton is 127cm3 larger than that of the first carton. The edge length of the second carton is calculated
- 19. What is the volume of a cube cardboard box with an edge length of 8cm? How many square centimeters of cardboard should be used to make 2000 cartons?
- 20. How to cut the rectangular cardboard (as shown in the figure) with 10 cm long and 6 cm wide to make a square cardboard box with 2 cm edge length? Use shadow to show the parts that should not be cut. At least two different schemes are given