Circumference
=
2
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r
=
2 x
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4
≈
25.13
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The answer depends on whether the 4 foot measure is the radius or the circumference.
Its radius is: 8/2 = 4ft
A circular fountain at a park has a radius of 4ft. The mayor wants to build a fountain that is quadruple the size of the current fountain . Find the length of the radius of a new fountain?
The area is 9.2376 square feet.
The surface area is 377ft2