the radius of a circular field is 20cm . inside the field a path of 2m uns all around . what is the area covered by the path ?
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Step-by-step explanation:
Area of circular field
Af = pi*r*r
Given, r = 20 m
Then,
Af = 22/7*20*20
= 8800/7
Area of inner circle
Ai = pi*(r - 5)*(r - 5)
= 22/7*(20-5)*(20-5)
= 22/7*15*15
= 4950/7
Area of circular path
= Af - Ai
= 8800/7 - 4950/7
= 3850/7
= 550 m^2
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