Answer:
14.21 units (14.2)
Step-by-step explanation:
Formula for area is W(L) or width multiplied by length.
The formula for finding the length of a rectangle's diagonal is :
d = [tex]\sqrt{w^{2}+l^{2} }[/tex]
Now we solve for d.
d = [tex]\sqrt{w^{2} + (\frac{A}{W})^{2}[/tex]
= [tex]\sqrt{9^{2} + (\frac{99}{9})^{2}[/tex]
≈ 14. 21267
≈ 14.2
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