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Use the equation
C = pi*d
Substitute
C = 3.14 * 25
C = 78.5 ft
NB This is only an approximate value, because '3.14' is only an approximate valuer for 'pi' , but convenient to use.
The other eq'n to use is
C = 2 pi r
Where 2r = d ( two radii equals one diameter ) . NB . 'radii' is the common noun plural of 'radius'. NOT 'radiuses'.
What else can I help you with?
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