Question

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Find the surface area of the cone. (Use 3.14 for π.)

a.) 376.8 cm^2

b.) 427.04 cm^2

c.) 527.52 cm^2

d.) 628 cm^2

Answer 1

Cone Height^2 = 13^2  -8^2
Cone Height^2 = 169 -64
Cone Height^2 = 105
Cone Height = 10.25

Lateral Area = PI * Radius * slant height
Lateral Area = 3.14 * 8 * 13
326.73 cm^2

Area of the circular section = PI * 8^2
circular section area = 201.06

Total area = 527.79

Answer is c