Answer:
Sum of the length and width = [tex]18\,m[/tex]
Step-by-step explanation:
Area of the rectangle= [tex]45\,m^2[/tex]
[tex]Width=3\,m[/tex]
Area of the rectangle= [tex]Length\times Width[/tex]
[tex]45=Length\times 3\\\\Length=\dfrac{45}{3} \\\\Length=15\,m[/tex]
The sum of the length and width of the rectangle is:
[tex]=15+3\\\\=18\,m[/tex]
