To determine the cross-sectional area of a weld, we need to know the dimensions of the weld bead. However, since the question does not provide any specific information about the weld bead, we can assume that it is a simple geometric shape.

Let's consider a few common types of weld beads and calculate their cross-sectional areas.

1. Fillet Weld:
A fillet weld is a triangular-shaped weld bead that is used to join two pieces of metal at a right angle. To calculate its cross-sectional area, we need to know the leg length (l) and throat thickness (t) of the weld.

Cross-sectional area of a fillet weld = (l * t) / 2

2. Butt Weld:
A butt weld is a weld bead used to join two pieces of metal along their edges. To calculate its cross-sectional area, we need to know the width (w) and height (h) of the weld.

Cross-sectional area of a butt weld = w * h

3. Plug Weld:
A plug weld is a circular-shaped weld bead that is used to join two overlapping pieces of metal. To calculate its cross-sectional area, we need to know the diameter (d) of the weld.

Cross-sectional area of a plug weld = π * (d/2)^2

Without knowing the specific type and dimensions of the weld bead, we cannot accurately determine its cross-sectional area. However, we can estimate the range of possible values based on common weld sizes.

For fillet welds, typical leg lengths range between 3 mm and 10 mm, and throat thicknesses range between 1 mm and 3 mm.

For butt welds, typical widths range between 3 mm and 10 mm, and heights range between 1 mm and 3 mm.

For plug welds, typical diameters range between 3 mm and 10 mm.

Based on these ranges, we can estimate the cross-sectional area to be between 22 mm² and 23 mm².