Answer:
Exact - 40n m²
Approximate 125.6m²
Step-by-step explanation:
Exact area of the sidewalk - n * (11 m)² - n * (9 m)²
- n * 121 m²- n * 81 m²
Exact area of the sidewalk - 40n m²
To find the approximate area of side walk let us substitute pi equals 3.14.
40*3.14 m²
Approximate area of the side walk - 125.6 m²
Therefore the exact area is 40n m² , the approximate area is 125.6 m²
