What will be the total surface area (in cm2) of a right circular cone with base diameter 14 cm and height 24 cm? (Take π = 22/7)
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 704.
Radius (r) = 14/2 = 7 cm
Slant height (l) = √(r2 + h2) = √(72 + 242) = √(49 + 576) = √625 = 25 cm
Total surface area = πr(l + r) = (22/7) × 7 × (25 + 7)
= (22/7) × 7 × 32
= 704 cm2