Question 380529
The area of shaded portion = area of larger circle - area of smaller circle.
larger circle
radius = 8 "
Area = pi*8*8
area = 64 pi
...
Area of inner circle = pi*4*4
area = 16pi
..
difference = 64pi-16pi
=48pi
=48*3.14
=150.72 in^2 is the shaded area
..
1 in^2 = $6.50
150.72in^2= 150.72*6.50
=$ 979.68 is the cost
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m.ananth@hotmail.ca