Question 445401
Let the width of sidewalk be x 															
..															
Length of ground =24												
Width =	18												
															
Area =	432 M^2										
Area of sidewalk =	68M^2						
(24-2x)(18-2x)=216
432-48x-36x+4X^2=216
4X^2-84x-216=0					
/4
x^2-21x-54=0
(x-18)(x-3)=-
x=18 OR x=3
the with is obviously 3 yards