Question

A circular flower bed is 16 m in diameter and has a circular sidewalk around it that is 3 m wide. Find the area of the sidewalk in square meters. Use 3.14 for pi

pls help me (:

Answer 1

Area of sidewalk = 178.98 m²

Explanation:

Given:

Diameter = 16 m

Length of sidewalk = 3 m

Find:

Area of sidewalk

Computation:

Radius of circle = 16 / 2 = 8 m

Radius of outer circle = 8+3 = 11 m

Area of sidewalk = π[r1² - r2²]

Area of sidewalk = π[r1² - r2²]

Area of sidewalk = 3.14[11² - 8²]

Area of sidewalk = 3.14[121 - 64]

Area of sidewalk = 3.14[57]

Area of sidewalk = 178.98 m²