![](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 cylindrical plasticine has a bottom area of 12.56 square centimeters and a height of 6cm. If it is made into a cone of the same size on the bottom of the cylinder, the volume of the cone is
12.56 * 6 = 75.36 square centimeter
The volume does not change
A cylindrical plasticine with a bottom area of 3.14 square meters and a height of 2 cm is kneaded into a cone with a bottom area of 12.56 square centimeters. What is the height of the cone
What's the volume of the dough
3.14 × 2 = 6.28 (cm3)
Cone height
6.28 × 3 △ 12.56 = 1.5 (CM)
1. Xiaoqing kneaded a cylindrical plasticine with a bottom area of 3.14 square centimeters and a height of 4 centimeters into a cone with a bottom area of about 12.56 square centimeters
The height of the cone is about () cm
2. Use a piece of rectangular paper 6 cm long and 4 cm wide to cut out the largest circle. The area of the circle is () square centimeter, and () square centimeter needs to be cut out
1. Xiaoqing kneaded a cylindrical clay with a bottom area of 3.14 square centimeters and a height of 4 centimeters into a cone with a bottom area of about 12.56 square centimeters. The height of the cone is about (3) centimeters
The height of a cone
=（3.14×4）×3÷12.56
=37.68÷12.56
=3 (CM)
2. Use a piece of rectangular paper 6 cm long and 4 cm wide to cut out the largest circle. The area of the circle is (12.56) square cm, and (11.44) square cm needs to be cut out
The diameter of the circle is equal to the shorter side of the length and width of the rectangle, which is 4cm
Radius of circle = 4 △ 2 = 2 (CM)
Area of circle = 3.14 × 2 × 2 = 12.56 (square centimeter)
Area to be cut
=6×4-12.56
=24-12.56
=11.44 (cm2)
RELATED INFORMATIONS
- 1. A cylinder with a bottom area of 3.14 square centimeter and a height of 2 cm is made into three cones with a bottom area of 12.56 square centimeter. How high is the cone Take a cylinder with a bottom area of 3.14 square centimeter and a height of 2 cm and make three cones with a bottom area of 12.56 square centimeter with rubber clay. How high is the cone?
- 2. Xiaolan made a cylinder with a bottom area of about 3.14cm2 from a cone with a bottom area of 12.56cm2 and a height of 1.5cm______ cm．
- 3. 72 square meters = [] square decimeters = [] square centimeters
- 4. The following statement is wrong () A. 0 multiplied by any number will get 0b. 0 divided by any number will get 0C. Any number multiplied by 1 or divided by 1 will get the original number
- 5. Given that X / 3 = Y / 4 = m / 5 is not equal to 0, find the value of X + y + m / x + y-m The fraction should write the process, not the value directly
- 6. In fact, we think 0.9 cycle is about 1. In fact, 0.9 cycle equals 3 times 0.3 cycle equals 3 times one third equals 1. What's your mathematical view
- 7. Mathematics problem, I am 1.71 meters, equivalent to how many feet, how many inches?
- 8. What is X-1 in 5 equal to 6 in 5
- 9. What's 160 times 30%
- 10. Calculation: 160 ° 22'30 '
- 11. The circumference of the bottom surface of a cylinder is 12.56 meters, and the height is 5 meters. The surface area of the cylinder is [] square meters, and the volume is {cubic meters
- 12. 1.09M = () mm2.56t = () kg2.3kg = () g4.6m = () decimeter Write the procedure first, then fill in the appropriate number Example: 109 decimeters = (1.09) meters Process: 109 △ 100 = 1.09 1.09M = () mm 2.56 tons = () kg 2.3kg = () g 4.6 m = () decimeter
- 13. Fill in the minimum fraction:) 56 square decimeters = () square meters 200 kg = () tons 28 hectares = () square meters
- 14. A rectangular piece of land, 400 meters wider, becomes a square, and the area increases by 56 hectares. How many square meters is the original rectangular area
- 15. 0.5 ha = () km2 Answer in a minute
- 16. How many hectares is 5 / 8 square meter?
- 17. How many cubic meters is 175 cm long multiplied by 40 cm wide and 55 cm high?
- 18. 56 pieces of moon cakes are packed in boxes, and each box contains the same amount. How many packing methods are there? How many boxes do you need for each packing method? If there are 17 pieces?
- 19. Half of the length of a bundle of rope is less than 5 meters, and 56 meters are left. How long is the original rope
- 20. After one third of a rope is subtracted, there is still 12.56 decimeters left. If the subtracted rope is enclosed into a circle, how many square decimeters is the area of the circle?