The curved surface area of a cone is 2200 cm² and its radius is 28 cm, what is the slant height (in cm) of the cone?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 25.
The curved surface area of the cone = π × r × l
where l = slant height; r = radius
Curved surface area = 2200
⇒ π × r × l = 2200
⇒ 22/7 × 28 × l = 2200
⇒ l = 25 cm