Height of a right circular cone is 8 cm. If diameter of its base is 12 cm, then what will be the curved surface area of the cone?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 1320/7 cm2
| Understanding/Application |
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Diameter of the base of the cone = 12 cm Radius = d/2 = 12/2 = 6 cm Height of the cone = 8 cm Slant height = l l2 = √ (h2 + r2) = √ 82 + 62 = √ 100 l = 10 cm |
| CSA of cone = πrl = (22 × 6 × 10)/7 = 1320/7 cm2 |