SOLUTION: The perimeter of a figure is the sum of the lengths of its sides. A circular fish pond is surrounded by a path 2 m wide. The inner and outer edges of the path are fenced.if the di

Algebra ->  Customizable Word Problem Solvers  -> Geometry -> SOLUTION: The perimeter of a figure is the sum of the lengths of its sides. A circular fish pond is surrounded by a path 2 m wide. The inner and outer edges of the path are fenced.if the di      Log On

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Question 985189: The perimeter of a figure is the sum of the lengths of its sides.
A circular fish pond is surrounded by a path 2 m wide. The inner and outer edges of the path are fenced.if the diameter of the fish pond is 8 m, how much longer is the outer fence than the inner?

Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
circumference of a circle is pi * diameter
length of outer fence = pi * ( 8+2+2) = 12 * pi = 37.68 m
length of inner fence = pi * ( 8+1+1) = 10 * pi = 31.40 m
note I am using pi = 3.14
37.68 - 31.40 = 6.28 m, therefore
the outer fence is 6.28 m longer than the inner