If a cone has a radius of 5 cm and the height is 8 cm.What is the surface area the cone About the author Mia
Answer: 226.73 cm² Step-by-step explanation: Curved Surface Area of cone = πrl Radius (r) = 5cm Height (h) = 8cm We know, slant height (l) = √ (h)² + (r)² = √ 8² + 5² = √ 64 + 25 = √ 89 = 9.44 cm [approx] Therefore, the Curved surface area of cone = 22 × 5 × 9.44 7 = 148. 35 cm² (approx) __________________________ Total surface area of cone = 226.73 cm² = πrl + πr² or πr ( r + l) Reply
Answer:
226.73 cm²
Step-by-step explanation:
Curved Surface Area of cone = πrl
Radius (r) = 5cm
Height (h) = 8cm
We know,
slant height (l)
= √ (h)² + (r)²
= √ 8² + 5²
= √ 64 + 25
= √ 89 = 9.44 cm [approx]
7
= 148. 35 cm² (approx)
__________________________
Total surface area of cone
= 226.73 cm²
= πrl + πr² or πr ( r + l)
Answer:
226.73
Step-by-step explanation:
A=πr(r+sqrt(h^2+r^2)) use thi equations