The capacity of an ice cream cone is 66 cm3. What is the radius ( in cm ) of its base if its height is 7 cm ( use ) ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 3 .
Volume formula: (1/3) × π × r² × h = 66
(1/3) × (22/7) × r² × 7 = 66
=> (22/3) × r² = 66
=> r² = (66 × 3) / 22 = 9
=> r = √9 = 3 cm