![](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>)
A cube lead block with an edge length of 8 cm is installed in a cuboid glass tank of 16 cm long, 10 cm wide and 20 cm high, and then some water is put into the tank to completely submerge the cube lead block. When the lead block is taken out of the tank, how many cm will the water in the tank drop?
8 × 8 × 8 ^ (16 × 10) = 512 ^ 160 = 3.2 (CM) a: the water in the tank will drop by 3.2 cm
In a 20 cm long, 16 cm wide and 18 cm high cuboid glass jar, put a cube with an edge length of 8 cm
20 divided by 8 equals 2 plus 4
16 divided by 8 is 2
18 divided by 8 is two and two
So two times two times two equals eight
Put down eight
The sum of the edges of a cuboid is 96 cm, its length is 9 cm and its width is 8 cm. What is the surface area of the cuboid?
The height of the cuboid is 96 △ 4-9-8 = 24-9-8 = 7 cm
The surface area of the cuboid is 2 × (9 × 8 + 9 × 7 + 8 × 7) = 382 square centimeters
The total length of the edges of a cuboid is 96 cm. The known length is 8 cm, the height is 7 cm, and the width is several cm
（8+7+X）*4=96
x=9cm
2, 3, 6 and 9 are 24 points
Too many methods. 3 * 9 = 27 6 / 2 = 3 27-3 = 24 9-2-3 = 4 4 * 6 = 24
2+6=8 9/3=3 3*8=24 9-3=6 6+6=12 12*2=24 2*6=12 12+3+9=24
=====
The equation of motion of a particle is s = 1.3t * 3, and the instantaneous acceleration at t = 1 second can be obtained
First question: isn't 1 / 3T * 3 about 1 / T?
If the above is on the right side of your equation, the two sides will take the derivative of time: the velocity v = - 1 / T ", and then take the derivative, that is, the acceleration a = 2 / T3 (not three times, but the third power of T, not easy to express), and then substitute = 1 into it
How to calculate the formula of cylinder weight
Volume of cylinder = bottom area × height
Weight = volume of cylinder × specific gravity
The perimeter of a rectangle is 20 meters. The meters of its length and width are prime numbers. How many square meters is the area of the rectangle?
20 △ 2 = 10m
10=3+7
Area: 3 × 7 = 21 square meters
In the plane rectangular coordinate system, the number of intersections between the image of quadratic function y = x2-1 and X axis is ()
A. 3B. 2C. 1D. 0
Let y = 0, then x2-1 = 0. The solution is x = ± 1. There are two intersections between the parabola and the x-axis, that is (+ 1,0), (- 1,0)
What is the weight of one cubic meter of C25 underwater concrete?
The bulk density of underwater concrete is 2500kg / m3
RELATED INFORMATIONS
- 1. A cuboid is 8 cm in height, 1 / 2 in width and 5 / 4 in width. The cuboid is () cm in width, () cm in length, () cm in edge length, () m3 in volume and () cm2 in surface area
- 2. The circumference of the bottom of a cuboid is 36 cm, and the height is 8 cm. What is the total length of the edges of the cuboid?
- 3. The circumference of the bottom of the cuboid is 36 cm and the height is 8 cm. The total length of the edges of the cuboid is () cm
- 4. Use three cuboids that are 3cm long, 2cm wide and 1cm high to form a large cuboid with the smallest surface area. How many square centimeters is the surface area of this cuboid
- 5. There is an empty cuboid container a 40 cm long, 30 cm wide and 20 cm high. There is another cuboid container B 30 cm long, 20 cm wide and 24 cm deep. Now pour part of B's total water to a so that the water in the two containers is the same height. How many cm deep is the container
- 6. The length, width and height of a cuboid container are 60cm, 40cm and 30cm respectively. The original height of the water surface is 25cm. After putting it into a cuboid container The length, width and height of a cuboid container are 60cm, 40cm and 30cm respectively. The original height of the water surface is 25cm. After putting in a cuboid iron block, all the iron blocks are submerged in the water, and the height of the water surface rises to 28cm. The length of the iron block is 20cm, the width is 15cm, and how many centimeters are behind the iron block?
- 7. A and B are two cuboid containers. Container a is 40 cm long, 30 cm wide and 24 cm high. Container B is 20 cm long, 20 cm wide and 36 cm deep. Pour the water in container B into container a until the water depth in the two containers is the same. How many mm is the water depth in both containers?
- 8. A. The bottom area ratio of two cylindrical containers B is 4:3. The water depth of container a is 20 cm, and that of container B is 10 cm. Now, the same amount of water is injected into the two containers to make the water depth of the containers equal. At this time, the water depth of container a is 20 cm, and that of container B is 10 cm______ Cm
- 9. My mother put some potatoes in a cylindrical container with a bottom area of 40 square centimeters to clean. At this time, the water depth in the container was 30 cm. After taking out the potatoes, the water dropped by 3 cm. What was the volume of these potatoes______ Cubic centimeter
- 10. In a rectangular container 20 decimeters long and 15 decimeters wide, there is water 20 decimeters deep. Now a cube iron block is sunk in the water, and the water surface rises 09 decimeters. What's the volume of this cube iron? 2. There are three cube iron blocks, their surface areas are 24 square centimeters, 54 square centimeters and 294 square centimeters respectively. Now dissolve the three iron blocks into a big cube, and find the area of the big cube
- 11. In a cylindrical glass tank with a bottom radius of 10 cm and a water depth of 8 cm, an iron block of 8 cm in length and width and 15 cm in height should be placed in the tank 1. How many centimeters will the water surface rise when the iron block is placed horizontally in the water? 2. Put the iron block in the water vertically, how many centimeters will the water rise?
- 12. In a cylindrical bottle with a bottom radius of 10 cm, the water depth is 8 cm. To put a piece of iron in the bottle, which is 8 cm in length and 15 cm in width and 15 cm in height, how many cm does the water surface rise when the iron is placed vertically in the water?
- 13. In a cylindrical bottle with a bottom radius of 10 cm, the water depth is 8 cm. To put a piece of iron in the bottle, which is 8 cm in length and 15 cm in width and 15 cm in height, how many cm does the water surface rise when the iron is placed vertically in the water?
- 14. A cuboid food box is 10 cm long, 8 cm wide and 12 cm high. Stick a circle of brand paper around it. How many square centimeters should the area of brand paper be at least?
- 15. A rectangular food box is 8 cm long, 6 cm wide and 10 cm high. If a circle of brand paper is pasted around the food box, how many square meters is the area of the brand paper at least?
- 16. Cut a cuboid 16 cm long, 8 cm wide and 10 cm high into two cuboids of exactly the same shape and size. What is the maximum and minimum surface area of the cuboid?
- 17. Cut a cube with an edge length of 8 cm into two cuboids of the same shape and size. The volume () and surface area () of each cuboid
- 18. A rectangle shaped plexiglass is 10 cm long, 8 cm wide and 6 cm high. Cut the largest cube on the plexiglass and find the rest
- 19. A cuboid glass jar is 4 decimeters long, 3 decimeters wide and 5 decimeters high. After pouring water, the water depth is 3.5 decimeters, and the poured water is () liters A. 60B. 42C. 52.5
- 20. Pour 18 liters of water into a rectangular glass tank 4 decimeters long, 3 decimeters wide and 2 decimeters high. How many decimeters is the distance between the water surface and the tank mouth?