A Circular Fountain 10 Ft In Diameter Has A Circular Walk 3 Ft Wide Paved Around It. What Is The Area Of The Walk?

View this design as one smaller circle inside a bigger circle. The smaller circle is the circular fountain and the larger circle is that plus the walk around it. The area of the walk would be the difference between the area of the larger circle and the smaller circle.

Area of the fountain:
diameter = 10
radius = 10/2=5
Area = pi.r²
Area = 3.14 x (5)²
Area = 78.5 feet²

Area of fountain + walk:
diameter = 10 + 3 = 13
radius = 13/2 = 6.5
Area = pi.r²
Area = 3.14 x (6.5)²
Area = 132.6 feet²

Area of the circular walk = Area of larger circle - area of smaller circle
  = 132.6 - 78.5
  = 54.1 feet²

Therefore, the area of the walk around the fountain is 54.1 square feet.