Question

a circular area of radius 12 cm has a road of 4 cm and width all around its outside find the area of the road


please help me
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Answer 1

Answer:

Let radius of Area (A)= Radius of circular park +radius of road

=12+4=16 cm

Using Area of Circle= pi.r²

A=pi×16²

=pi×256

Area of circular Park(a)=pi*12²

=pi*144

Now Area of Circular Road= A-a

=pi.*256-pi*144

=pi(256-144)

=pi(112)

=2464/7

=352 cm²

Area of the road= 352 cm²

Hope this helps you