The answer would be b and c
Answer:
The answer to your question is A = 200.96 u²
Step-by-step explanation:
Data
Radius A = 6
Radius B = 2
π = 3.14
Area = ?
Formula
Area = πr²
Process
1.- Calculate the radius of the large circle
Radius = radius of circle A + radius of circle B
Radius = 6 + 2
Radius = 8
2.- Substitute in the formula
Area = (3.14)(8)²
Area = 3.14(64)
Area = 200.96 u²
Please note that in proving this, I have used trigonometric identities other than just the sine angle-addition formula.
Answer:

Step-by-step explanation:
Given: The diameter of the cylindrical base of the pencil is 10 mm and the height of the cylinder is 70 mm, while the height of the cone is 12 mm
To find: surface area of the pencil
Solution:
Radius of the cone = Radius of the cylinder (r) = diameter/2 = 
Height of the cylinder (H) = 70 mm
Height of the cone (h) = 12 mm
Slant height of the cone (l) = 
Curved surface area of cone = 
Surface are of cylinder = curved surface area of cylinder + base area of cylinder
![=2\pi rH+\pi r^2\\=\pi r(2H+r)\\=\pi(5)\left [ 2(70)+5 \right ]\\=5 \pi\left ( 140+5 \right )\\=725\pi\,\,mm^2](https://tex.z-dn.net/?f=%3D2%5Cpi%20rH%2B%5Cpi%20r%5E2%5C%5C%3D%5Cpi%20r%282H%2Br%29%5C%5C%3D%5Cpi%285%29%5Cleft%20%5B%202%2870%29%2B5%20%5Cright%20%5D%5C%5C%3D5%20%5Cpi%5Cleft%20%28%20140%2B5%20%5Cright%20%29%5C%5C%3D725%5Cpi%5C%2C%5C%2Cmm%5E2)
So,
surface area of the pencil = Curved surface area of cone + Surface are of cylinder = 
Answer:
See the diagram
Step-by-step explanation:
