a circular Park of radius 12cm has the road of 3 centimetres width all around it outside find the area of the road
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Radius of circle = 12 cm
Area = pi ☓ r^2
Area = 3.14 ☓ 144 cm2
Area = 452.16
Now radius of outer circle formed due to ring of road = 12 +6cm = 18cm
Area of outer circle = 1017.36
Area of road = area of outer circle - area of circle park.
➡️ Area = 1017.36 - 452.16 cm2
➡️ Area of road = 565.2cm2
Answer is this when pi = 3.14
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