Answer:
346.19 m²
Explanation:
The diameter of the circular flower bed is 15 m and the length of the sidewalk round the flower bed is 3 m.
This means that an extra length of 3 m is added on each side.
The joint diameter of the flower bed and sidewalk is:
15 + 3 + 3 = 21 m
The radius is half of the diameter, that is 10.5 m
The area of the sidewalk is therefore:
A = pi * r²
Where r = radius
A = 3.14 * 10.5²
A = 346.19 m²