The height of a cone is 24 cm and the area of the base is 154 cm2. What is the curved surface area (in cm2) of the cone?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 550
Area of base = 154 cm2
⇒ 22/7 × r2 = 154
⇒ r = 7 cm
Slant height, l = √(72 + 242) = √625 = 25 cm
इसलिए,
CSA of cone = πrl = 22/7 × 7 × 25 = 550 cm2