Mathematics: What is the surface area of the cone? (use 3.14 for π.)

bet i will when i find it! have a good one...

What is the surface area of the cone? (use 3.14

lizzyhearts

13.03.2022

To solve this problem you must apply the proccedure shown below:

1. You must apply the formula for calculate the surface area of a cone, which is:

$SA=\pi r^{2} +\pi rl$

Where is the radius ( r=7cm ) and is the slant height ( l=12cm ) and $\pi =3.14$

2. You need to substitute these values into the formula:

$SA=(3.14) (7cm)^{2} +(3.14)(7cm)(12cm)\\ SA=417.62cm^{2}$

Therefore, the answer is the last option: $417.62cm^{2}$

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