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The surface area of the figure is 580 ft².
To calculate the surface area, you need to find the area of each face of the figure and add them up.
The figure has 6 faces:
- Two faces are 8ft x 15ft = 120 ft² each
- Two faces are 8ft x 20ft = 160 ft² each
- Two faces are 15ft x 20ft = 300 ft² each
Add up all the areas: 120 + 120 + 160 + 160 + 300 + 300 = 1060 ft²
So the surface area of the figure is 1060 ft².