Answer
$l=15$ yard and $w=12$ yard
Work Step by Step
Formula to calculate the area of a rectangle, $A= l \times w$
Here, $l= w+3$
Thus, $A= (w+3) \times w =w^2+3w$
or, $w^2+3w=180$
or, $w^2+3w-180=0$
This implies $w^2+15w-12w-180=0$
or, $(w+15)(w-12)=0$
Thus, $w=-15,12$; $A \neq -negative$
Hence, $l=w+3=12+3=15$ yard and $w=12$ yard