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Pizza Borders

GMAT-TKUWTO

Timmy the Chef wants to put a layer of cheese around $3$ edges of the border of his signature rectangular pizza.

If he leaves a $7$-inch edge cheese-free and the entire pizza has an area of $63$ square inches, how many inches long is Timmy's cheese border?

A

$7$

B

$9$

C

$16$

D

$23$

E

$25$