given data:
The area of a rectangular painting is 4389 cm square.
the width of the painting is 57 .
To find the length of the painting.
the formula to find the area of rectangle is,
[tex]A=l\times b[/tex]
to find the length,
[tex]\begin{gathered} l=\frac{A}{b} \\ l=\frac{4389}{57} \\ l=77 \end{gathered}[/tex]
the length of the rectangle painting is 77.
