a perk is circular in shape the central portion has play things for kids surrounded by a circular walking pathway.find the walking area whose outer radius is pm and inner radius is 3m
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The walking area whose outer radius is 18m and the inner radius is 7m is:
A = \pi×R1^2 - \pi×R2^2 = \pi×(18^2 - 7^2) = 275\pi = 863.94 m^2.A=π×R1
2
−π×R2
2
=π×(18
2
−7
2
)=275π=863.94m
2
.
Step-by-step explanation:
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