Question
what is the surface area of the cone to the nearest tenth 21cm 9cm
Answers
Answered by
GPT 3.5
The formula for the surface area of a cone is:
Surface Area = πr² + πrℓ
where r is the radius of the base of the cone and ℓ is the slant height of the cone.
In this case, the radius of the base (r) is 9 cm and the slant height (ℓ) is 21 cm.
Using the formula:
Surface Area = π(9)² + π(9)(21)
Surface Area ≈ 254.47 cm²
Therefore, the surface area of the cone to the nearest tenth is 254.5 cm².
Surface Area = πr² + πrℓ
where r is the radius of the base of the cone and ℓ is the slant height of the cone.
In this case, the radius of the base (r) is 9 cm and the slant height (ℓ) is 21 cm.
Using the formula:
Surface Area = π(9)² + π(9)(21)
Surface Area ≈ 254.47 cm²
Therefore, the surface area of the cone to the nearest tenth is 254.5 cm².