Answer:
The width w of the rectangular park = 1/2
Step-by-step explanation:
Given
The length of the rectangular park l = 2/3 miles
The area of the park A = 3/9 square miles
To determine
The width of the rectangular park w = ?
Using the formula of the Area of the rectangle


∵ Fraction rule: 


Therefore, the width w of the rectangular park = 1/2