Slope intercept: y=-3/4x+2
        
             
        
        
        
ANSWER
w=48,l=60
EXPLANATION
Let the width of the field be, w , then,
the length of the field will be:

The area of a rectangle is 

This implies that:

Expand 



This implies that,

The dimensions are positive, the width is 48 and the length is 12+48=60
 
        
             
        
        
        
Volume of a rectangular prism is length x width x height.
Volume = 8 x 3 x 3 = 72 cubic feet