![](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>)
Dig a cylindrical reservoir with a bottom radius of 5 meters and a depth of 4 meters. How many cubic meters can this reservoir store?
3.14 × 52 × 4, = 3.14 × 25 × 4, = 3.14 × 100, = 314 cubic meters; answer: this reservoir can store 314 cubic meters
How many cubic meters of water is needed to fill a cuboid with 40 meters of water every minute?
emergency
Volume: 30x40 = 1200m3
Floor area: 1200 △ 4 = 300 square meters
A cuboid reservoir needs to store water 2.4 meters deep. If the water is injected 30 cubic meters per minute and filled up in 40 minutes, what is the bottom area of the reservoir?
A: the bottom area of this pool is 500 square meters
There is a cuboid wood, its edge length is 3DM, 4dm, 5DM respectively. This wood is processed into a largest cylinder. What is the volume of this cylinder
A cone with a radius of 5cm at the bottom is cut into two parts vertically from the top along the height, and the surface area is increased by 180cm & sup2;. The volume of the cone is calculated
The bottom radius of the cylinder is 3 decimeters and the height is 5 decimeters
Volume 3.14x3x5141.3 cubic decimeter
A cuboid wood, 1.2m long and 1.1m wide, is processed into a cylinder, which has the largest volume
How much is it
The radius of the cylinder is 1.1g2 = 0.55M, the height is 1m
The maximum volume of the cylinder is 3.14 * 0.55 * 0.55 * 1 = 0.94985m3
emergency
A cuboid wood with a length of 20 cm, a width of 10 cm and a height of 10 cm is processed into the largest cylinder wood block. What percentage of the volume of the cylinder wood block is that of the original cuboid wood block?
If a cuboid wood with a length of 20 cm, a width of 10 cm and a height of 10 cm is processed into the largest cylinder wood block, then the maximum diameter of the cylinder is 10 cm, the radius is 10 △ 2 = 5 (CM), and the height is 20 cm
5 × 5 × 3.14 × 20 = 1570 (cm3)
The original cuboid volume is:
20 × 10 × 10 = 2000 (CC)
The volume of the cylinder block is the same as that of the original cuboid block
1570÷2000×100％=78.5％
When the height of a cuboid is increased by 3DM, the surface area of the cuboid is increased by 48dm. How many cubic decimeters is the cuboid volume?
Formula!
This is how the paper is written!
48 / 4 / 3 = 4, the side length of the bottom of the cuboid is obtained, the bottom is square, and the increased surface area is the area of four sides
So 48 / 4
4-3 = 1
4 * 4 * 1 = 16 to get the cuboid volume
A cuboid tank without cover, 5DM long and 3DM wide, has a surface area of () square decimeter and a volume of () cubic DM
Surface area = 5 * 3 + 2 * (5 * 2 + 3 * 2)
=15+32
=47 (square decimeter)
Volume = 5 * 3 * 2
=15*2
=30 (cubic decimeter)
When an orange is poured into a 3 dm long and 1.5 DM wide cuboid glass jar, the water surface rises by 8 mm. What is the volume of an orange?
8mm＝0.08dm 3×1.5×0.08＝0.36
A cuboid water tank, 5DM long and 3DM wide, with the existing water depth of 1.5dm, submerges a stone in the water with the water depth of 2DM, and the volume of the stone is several cubic decimeters
The volume of the stone = the volume after putting the stone - the volume without putting the stone
The volume of the stone is 3 * 5 * 2 = 30 cubic decimeter
Volume without stone = 3 * 5 * 1.5 = 22.5 cubic decimeter
So the volume of the stone = 30-22.5 = 7.5 cubic decimeters
RELATED INFORMATIONS
- 1. Calculate the mass, volume and density of the stone It is known that when the stone is put into the water measuring cup, the water surface rises by 50ml. The weight of the stone is 131g. The mass of the stone is____ Kilogram. What's the volume of the stone____ Cubic meters, density is____ The third power of kg / m
- 2. How many square meters to measure the compactness with sand filling method? How many points to take? It's better to copy them to me from the specification,
- 3. Calculation formula of compactness in subgrade filling? Who knows how to calculate the compactness in subgrade filling?
- 4. Calculation formula of earthwork Subgrade I'm an apprentice in engineering survey, the calculation formula of common measurement formula in earthwork subgrade engineering, the calculation of the width between the slope toe [top] line and the center pile, the calculation of the elevation of digging culvert, etc., and the calculation of the excavation elevation, etc
- 5. With natural gravel sand: stone for 3:7, belong to stone subgrade or earthwork subgrade?
- 6. How many decimal places shall be reserved for the wet density and dry density of subgrade compactness? Is there any requirement in this specification?
- 7. It is generally known that a cubic meter of water is about one ton, so how can its density be calculated? If the density of water is 1, what is the density of wood and marble? When did you learn these questions? What textbook did you come from?
- 8. Try to find out the apparent density, bulk density and water absorption of the stone. Try to find out the apparent density, bulk density and water absorption of the stone? After a stone is completely dried, its mass is 482g. After it is prevented from entering the measuring cylinder filled with water and saturated with water, the water surface rises from 452c3 to 630cm3. After the stone is taken out and the surface water is dried, its mass is 487g. Try to calculate the apparent density, bulk density and water absorption of the stone?
- 9. The density of pebble material is 2.65, the apparent density is 2.61, and the bulk density is 1680?
- 10. What is the density of lime fly ash macadam in general
- 11. The diameter of a cylindrical pool is 20m, and the depth is 3M1. (1) what is the floor area of the pool? (2) how many cubic meters of soil need to be excavated to dig the pool?
- 12. The perimeter of a circular fountain is 62.8 meters. Build a 2 meter wide cement road around the fountain. Calculate the area of cement road It's a formula
- 13. If the height of a cube is increased by 2 cm, the surface area of the cube will be increased by 96 square cm. What is the original volume surface area? What is the volume surface area of the original cube?
- 14. The surface area of a cuboid is 60cm2. Now we just saw it into two equal cubes. What's the surface area of each cube?
- 15. The perimeter of a circular fountain is 12.56 meters. What is the area of the fountain? If the fountain is surrounded by a circular green belt with a width of 1 meter, what is the area of the green belt?
- 16. The school has a cylindrical fountain. The diameter of the bottom of the fountain is 12m. It can hold 56.52 cubic meters of water at most. How deep is the fountain?
- 17. Red scarf primary school has a round swimming pool with a bottom diameter of 1.4m 1. What is the floor area of this swimming pool? 2. Put ceramic tiles on the bottom and inner wall of the swimming pool. What is the area of tile? 3. Draw a water level line at 1.1m along the inner wall of the swimming pool. According to the water level line, how much water can be stored in the swimming pool;? The diameter of the bottom is 20 meters
- 18. The diameter of the bottom of the fountain is 8 meters. How many cubic meters of concrete is needed to build a concrete path with a width of 1 meter and a thickness of 20 cm along the fountain?
- 19. The perimeter of a semi-circular lawn is 30.84 meters. How many square meters is the area of this lawn?
- 20. In a 30 meters long, 10 meters wide, 2.2 meters deep cuboid cistern tiles, tiles are. 02 meters long cube, how many tiles? By the way, let you answer this question again. How many cubic meters can this reservoir store at most?