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Oversimplifying in the usual textbook manner:

The octagonal pier has eight faces, each 1 ft by 10 ft or 10 square feet.

Eight faces, each 10 square feet, requires 80 square feet.

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14y ago
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Q: The lateral surface of a concrete octagonal pier of height 10 ft is to be resurfaced.If each of the base edges is 1ft how many square feet of surfacing will be required?
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