To find the total surface area of the hourglass sculpture, which is composed of two cones, we first need to calculate the lateral surface area of one cone, and then double that since there are two cones.
The formula for the lateral surface area \( A \) of a cone is given by:
\[ A = \pi r l \]
where:
- \( r \) is the radius of the base of the cone,
- \( l \) is the slant height of the cone.
Given:
- The diameter of the cone is 8 feet, hence the radius \( r = \frac{8}{2} = 4 \) feet.
- The slant height \( l = 5 \) feet.
- We will use \( \pi \approx 3.14 \).
Now, we can calculate the lateral surface area of one cone:
\[ A = \pi r l = 3.14 \times 4 \times 5 \] \[ A = 3.14 \times 20 = 62.8 \text{ square feet} \]
Since the hourglass has two identical cones, we will multiply the area of one cone by 2:
\[ \text{Total Surface Area} = 2 \times 62.8 = 125.6 \text{ square feet} \]
None of the given options match this answer directly. However, the components must be checked if there are any mistakes in calculations or mismatches in the options provided. But based on the numbers provided and calculations made, the total surface area would be roughly 125.6 square feet.
If we consider if the ends (bases) of the cones are exposed, then we will have to account for those areas. However, based on the description that it’s an hourglass sculpted from steel, it might imply that only the lateral surfaces are counted.
Thus, if focusing solely on the lateral surfaces, the closest answer provided should be selected since none match exactly.
Upon double-checking and clarifications on the presence of any bases, but from the provided options, none directly align with the calculations of 125.6 square feet. Thus, it may seem attributed to a mistake in the presentation.