Question

What is the surface area of a cone that has a radius of 8 feet and a slant height of 12 feet? (Use 3.14 for π.)

301.44 ft 2

502.4 ft 2

200.96 ft 2

803.84 ft 2

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Answer 1

`SA=502.4\ ft^2`

Explanation:

we know that

The surface area of a cone is equal to

`SA=\pi r^(2)+\pi rl`

we have

`r=8\ ft\\l=12\ ft\\\pi=3.14`

substitute the given values

`SA=(3.14)(8^(2))+(3.14)(8)(12)`

`SA=200.96+301.44=502.4\ ft^2`