Help me figure the surface area of a partial cone please

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SUMMARY

The discussion focuses on calculating the surface area of a partial cone structure, specifically a concrete drainage canal bank where two canals intersect. The user initially attempted to average slant dimensions and the lengths of the top and bottom arcs, but found this method to be inaccurate. They also tried modeling the structure as a trapezoid, which proved to be even less accurate. The key dimensions provided are a horizontal dimension of 32.5 feet and a vertical dimension of approximately 10.5 feet.

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jonlorio
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I am trying to measure a concrete structure to compute the surface area.
I have included a sketch of the structure with the dimensions that I have measured. This is part of a drainage canal bank where two canals intersect. The banks along both canals are paved with concrete. I tried to just average the slant dimensions and average the lengths of the top and bottom arcs. Then, I simply multiplied them together to get an area. I feel this is inaccurate. I then tried to stretch it out into a trapezoid, but I feel this is even less accurate. Any help?


001.jpg
 
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also, the horizontal dimension is 32.5', and vertical dimension from top to bottom is 10.5' roughly...if that helps any.
 

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