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Find the surface area of a cone if the diameter of its base is 13.5 feet, and it has a slant height of 16.8 feet. Round to the nearest tenth.

A)928.7 ft2
B)572.6 ft2
C)499.2 ft2
D)356.1 ft2

Respuesta :

Riia

The diameter is given which is 13.5feet and radius is half of diameter. Therefore radius = 6.75 feet.

Slant height = 16.8 feet

The formula of surface area of cone is

[tex] S = \pi *r(r+l)
\\
S = \pi*6.75(6.75+16.8)
\\
S =\pi*6.75*23.55 = 499.2 ft^2 [/tex]

Correct option is C

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