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In order to measure the volume of potatoes, Xiao Ming carried out an experiment as follows: Put a certain amount of water into a cylindrical glass with a bottom diameter of 8 cm, and the height of the water surface is 6 cm. Put the potato into the water, and then measure the height of the water surface again, which is 10 cm. If the thickness of the glass is ignored, how many cubic centimeters is the volume of the potato?
The volume of water above is the volume of potatoes Representatives Δ * (8 / 2) ^ 2 * (10-6) = 64 Δ CC Or take 3.14 to get 200.96 cubic centimeter
What do you mean, potato, tomato, potato?
It should be swearing. Please remember it yourself
The reason why he is famous is the catchphrase Ouyang Feng said in the funny "dongchengxijiu"~
Later, it evolved into something like "potato, tomato, milk, bread, watermelon, pineapple" and so on~
Potato you a tomato, tomato you a potato what do you mean? Patiently answer!
Given a + B = - 1, find the value of cubic a - 3AB + b square
Wrong. It's the third power of + B
Wrong, it should be B & sup3;
A³+B³-3AB
=(A+B)(A²-AB+B²)-3AB
=-(A²-AB+B²)-3AB
=-A²+AB-B²-3AB
=-A²-2AB-B²
=-(A²+2AB+B²)
=-(A+B)²
=-(-1)²
=-1
X + 120 = 3 / 5 [6x - (x + 120)] to solve the equation, I want the process to be 576
X+120=3/5[6X-(X+120)]
X+120=3/5(6X-X-120)
X+120=3X-72
2X=192
X=96
Triangle surface area formula?
(base times height) divide by two, because the base times height is the area of a parallelogram, and two triangles are a parallelogram, so divide by two to write such a full bonus
If cos (a + 30 °) = 5 / 13, then cosa =?
You can build a triangle of 5, 12, 13, and then draw 30 degrees out of the 12 opposite sides to calculate the other sides. According to cosa = B ^ 2 + C ^ 2 + A ^ / 2BC, it's OK
Solving equation 2x + 3 = 2x-5
There's no solution. It's 2x on both sides, but 3 doesn't equal - 5
Given the quadratic function y = 3x & sup2; + 12x + 13, then the minimum value of function value y is?
y=3x²+12x+13
=3（x²+4x）+13
=3（x²+4x+4-4）+13
=3（x+2）² +1
∵ 3（x+2）²≥0
∴3（x+2）² +1≥1
The minimum value of y = 3x & sup2; + 12x + 13 is 1
It is known that the eccentricity of a square ABCD with focus a and C and ellipse passing through point B is ()?
As shown in figure (1), if the side length is t, then | AC | = √ 2T, that is, 2C = √ 2T | ab | + | AC | = 2T, that is, 2A = 2T eccentricity e = 2C / 2A = √ 2 / 2
RELATED INFORMATIONS
- 1. Cast a rectangular iron block of 10 cm long, 8 cm wide and 5 cm high into a cylinder iron block of 20 cm in diameter, and calculate the height of the cylinder iron block Two decimal places are reserved for the loss result
- 2. A cuboid with a length of 8 cm, a width of 5 cm and a height of 3 cm and a cube iron block with an edge length of 6 cm are melted and cast into a cylinder with a height of 10 cm to find a circle What is the area of the bottom of the column?
- 3. A rectangular iron block with a length of 10 cm, a width of 8 cm and a height of 7.85 cm is fused into a cylinder with a diameter of 8 cm at the bottom What is the height of this cylinder?
- 4. A piece of irregular stone was submerged in a rectangular glass tank 5 decimeters long and 4 decimeters wide. It was measured that the water surface rose 5 cm. What is the volume of this stone
- 5. A cuboid container, 3 decimeters long, 2 decimeters wide, 5 decimeters high, put an irregular stone into the container, just submerged by water, the water just rose How many cubic decimeters is the volume of the stone?
- 6. A stone with a volume of 8 cubic decimeters is put into a cuboid container containing water. It is found that the water surface rises from 5 decimeters to 7 decimeters. Find the volume of original water Find the volume of original water
- 7. Put a square iron block 8 cm long into a rectangular container 2 decimeters long and 1.6 decimeters wide with water How many centimeters will the water surface rise if the iron block is completely submerged and the water does not overflow
- 8. An iron ball is immersed in a rectangular water container with a length of 1.2 decimeters and a width of 1 decimeters. The water surface rises by 31.5 cm. What is the volume of the iron ball?
- 9. Immerse an iron ball in a cube container with an edge length of 3 decimeters. The height of the water surface rises from 6 cm to 8 cm. What is the volume of the iron ball Decimeter? (why?)
- 10. A cuboid container is 6 cm long and 4.5 cm wide. The water surface is 1 cm away from the opening of the container. Put two eggs of the same size and overflow some water. Then take out the two eggs and the water surface drops 2 cm. Calculate the volume of each egg
- 11. In order to measure the volume of a potato, Xiao Ming carried out an experiment according to the following steps: (1) put a certain amount of water into a cylindrical glass with a bottom diameter of 12 cm, and the height of the water surface is 7 cm; (2) put the potato into the water, and then measure the height of the water surface is 8 cm. If the thickness of the glass is ignored, what is the volume of the potato Centimeter? (the number obtained keeps the whole number)
- 12. A piece of 8 cm long and 6 decimeter wide rectangular iron sheet is rolled into a cuboid with a square bottom. What is the maximum volume of this cuboid?
- 13. The newly built teaching building needs 150 cuboid drainage pipes with a length of 3 meters, a width of 1 decimeter and a height of 8 cm. The surface of the drainage pipe is a layer of iron sheet, which needs iron sheet How many square meters?
- 14. A cuboid glass can is 12 cm long, 8 cm wide and 5 cm high. When it is placed horizontally, the water depth is 3 cm. When it is placed vertically, how many cm is the water depth?
- 15. A rectangular glass with water has a bottom area of 60 square centimeters and a water depth of 8 centimeters. Now, after a cylinder iron block with a bottom area of 12 square centimeters is vertically placed in the water, some iron blocks are still exposed on the water. How many centimeters is the water depth now?
- 16. The length, width and height of a cuboid are 12.5 cm, 8 cm and 3 cm respectively. In this cuboid, what is the sum of the areas of the largest two?
- 17. A cuboid glass jar is 40 cm long, 25 cm wide and 12 cm deep. After a stone is immersed in water, the water surface rises to 16 cm and the volume of the stone is calculated
- 18. A cuboid glass jar is 40 cm long, 30 cm wide and 8 cm deep What is the volume of this stone in cubic decimeter?
- 19. A cuboid glass container is 20dm long and 15dm wide. The water depth in the container is 3.8dm Ask for guidance
- 20. A cuboid glass container is 20dm long and 15dm wide, and the water depth in the container is 3.8dm. After a cube iron block with 3DM edge length is put into the container, how much DM does the water surface in the container rise?