The circumference of the bottom of the cylinder is 25.12cm, and it is cut in half along the diameter of the bottom. The surface area of the cylinder is increased by 112 square cm
25.12 / 3.14 = 8 cm (bottom diameter)
112 / 2 / 8 = 7 cm (height of cylinder)
25.12 * 7 = 175.84 square centimeter (side area)
8 / 2 = 4cm (radius)
3.14 * 4 * 4 = 50.24 square centimeter (bottom area)
50.24 * 2 + 175.84 = 276.32 square centimeter (surface area)
RELATED INFORMATIONS
- 1. If the side area of a cylinder is 50.24 square centimeter and the height is equal to the bottom radius, what is the surface area?
- 2. When the height of the cylinder is 10 cm and the bottom radius is 6 cm, the side area of the cylinder is 0___ The surface area of the cylinder is__ cm²
- 3. If the height of a cylinder of 10 cm is increased by 2 cm, its surface area will be increased by 125.6 square cm
- 4. The diameter of the bottom surface of a cylinder is 4 meters and the height is 6 meters. If the cylinder is cut in half along the diameter of the bottom surface, how much will the surface area of the cylinder increase?
- 5. Surface area: 1. Bottom radius 3cm, height 5cm. 2. Bottom perimeter 15.7cm, height 4cm. 3. Bottom diameter 4cm, height 4cm 4. Lateral area 62.8dm, height 5DM
- 6. The diameter of the small cylinder is 6cm, the height is 12cm, the diameter of the large cylinder is 12cm, and its volume is twice the volume of the small cylinder?
- 7. Cut a cuboid 12 cm long, 9 cm wide and 5 cm high into two cuboids. What is the maximum sum of the surface area of the two cuboids? What's the minimum square centimeter?
- 8. A cylinder, 20 cm long, 5 cm long is cut off, the surface area of the cylinder is reduced by 31.4 square centimeters, the volume of the original cylinder
- 9. How large is the surface area of the largest cylinder cut from a cube with an edge length of 10 cm?
- 10. Cut a cube with an edge length of 6 decimeters into the largest cylinder. What is the volume and surface area of the cylinder? A section of square steel is 5 meters long and its cross section is a square with side length of 4 cm. How many kg does this section of square steel weigh? (7.8 kg per cubic decimeter of steel) a section of square steel is 5 meters long and its cross section is a square with side length of 4 cm. How many kg does this section of square steel weigh? (7.8 kg per cubic decimeter of steel)
- 11. a> The necessary and sufficient condition of B is Sina > SINB The necessary and sufficient condition of a > b is Tana > tanb Why wrong, because it's not monotonous? I am a novice That random code is >
- 12. Vector OA = (1,0) ob = (0,1) om = (T, t) (t belongs to R) (1) if three points of ABM are collinear, find the value of T (2) when t takes what value, vector Ma
- 13. Given the vector 0P = (2,4), OA = (2,6), OB = (5,1), let m be a point on the line OP, then the minimum value of ma * MB
- 14. Take points m and N on the convenient OA and ob of △ OAB so that om: OA = 1:3 and on: OB = 1:4. Let an and BM intersect at point P, and let OA = A and ob = B Let a and B denote the vector Op
- 15. In a tetrahedral o-abc with edge length 2, the square of (OA vector + ob vector + OC vector) is The answer is 24
- 16. It is known that the edge length of regular tetrahedron oabc is equal to 1, m and N are the midpoint of edges OA and BC respectively. Let vector OA = vector a, vector ob = vector B and vector OC = vector C (1) Finding the solution of vector m with respect to base (a, B, c) (2) Finding the length of line segment Mn (1) Finding the solution of the vector Mn with respect to the base (a, B, c) (2) Finding the length of line segment Mn
- 17. If O is a point in the plane of triangle ABC and iob-oci = iob + oc-2oai is satisfied, then the shape of triangle ABC is All the letters in the question represent vectors
- 18. In the triangular pyramid p-abc, △ PAC and △ PBC are equilateral triangles with side length √ 2, ab = 2, O and D are the midpoint of AB and Pb respectively 1) Verification: plane PAB ⊥ plane ABC (2) Find the volume of p-abc of triangular pyramid (3); OD is parallel to PAC
- 19. In the parallelogram ABCD, ad = a, be parallel to AC, De, the length line of AC intersects F and be intersects E
- 20. As shown in the figure, e is the outer point of parallelogram ABCD, and ab ⊥ EC, be ⊥ ed, is parallelogram ABCD a rectangle?