A conical party hat has a slant height of 10 cm and a radius of 7 cm. What is its curved surface area? (Use π=3.14)
Show answer & explanation
Correct answer: B
Explanation
Curved surface area of cone = πrl
Where, r = 7 cm
l = 10 cm
Therefore, curved surface area = 3.14 × 7 × 10
= 219.8 square cm