20 ft
Explanation
the area of a parallelogram is given by:
[tex]\text{Area}_{paralle\log ram}=base\cdot heigth[/tex]then
Step 1
Let
base=unknow length= x
heingth=1 1/4 feet = 1.25 ft
Area= 25 quare ft
now, replace.
[tex]\begin{gathered} \text{Area}_{paralle\log ram}=base\cdot heigth \\ 25ft^2=x\cdot1.25\text{ ft} \\ 25=1.25x \\ \text{divide both sides by 1.25} \\ \frac{25}{1.25}=\frac{1.25x}{1.25} \\ 20=x \end{gathered}[/tex]therefore, the length of the banner is 20 ft.
I hope this helps you
