# Width - Pizza Crust

Algebra

### Width - Pizza Crust

A pizza has a 3" radius for the pizza portion. The pizza has a total area of 25 pi sq. in. due to inclusion of the crust. Determine width of the crust.

Area of a circle - pi * r^2.

3.1416 * 3 * 3 = 28.8744 sq. in.

How do I proceed from this point ?
Challa

### Re: Width - Pizza Crust

Good night!

Area (total):
$$A_t=25\pi$$

$$A=\pi R^2=25\pi\\ R^2=25\\ R=\sqrt{25}\\ R=5''$$

So, if pizza has 3'' and due to inclusion of the crust, 5'', crost width is 2''.

Baltuilhe

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