To find the surface area of a cone, we need to find the lateral surface area and add it to the base area.
The lateral surface area of a cone is given by the formula: L = πrℓ, where r is the radius and ℓ is the slant height.
Given that the radius (r) is 6 and the slant height (ℓ) is 11, we can substitute these values into the formula:
L = 3.14 * 6 * 11
L ≈ 205.92
The base area of a cone is given by the formula: B = πr², where r is the radius.
Given that the radius (r) is 6, we can substitute this value into the formula:
B = 3.14 * 6²
B ≈ 113.04
To find the surface area, we add the lateral surface area (L) to the base area (B):
Surface Area = L + B
Surface Area ≈ 205.92 + 113.04
Surface Area ≈ 318.96
Therefore, the surface area of the cone is approximately 318.96 square units.
What is the surface area of the cone? Use 3.14 for pi and round to the nearest tenth, if necessary.
(1 point) radius is 6 and teh slant is 11
1 answer