A circular flower bed is 20 m in diameter and has a circular sidewalk around it that is 4 m wide. Find the area of the sidewalk in square meters. Use 3.14 for π.
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Answer:
r of flower bed = 20/2 = 10m
r of outer circle = 10+4 = 14m
area of outer circle = πr²
= 3.14×14×14
= 615.44 m²
area of flower bed = πr²
= 3.14×10×10
= 314 m²
area of sidewalk = 615.44-314
= 301.44m²
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