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➷ You have to find the circumference
The formula is

The diameter is double the radius
62.5 x 2 = 125
Substitute this in:
circumference =

circumference = 392.70 ft
Multiply this by the cost:
2.5 x 392.70 = 981.75
It will cost approximately $982
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➶ Hope This Helps You!
➶ Good Luck (:
➶ Have A Great Day ^-^
↬ ʜᴀɴɴᴀʜ ♡