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To find the total surface area of the figure, we first need to determine the surface area of each individual face and then add them all together.
Face 1 (10 mm x 6 mm) = 60 mm²
Face 2 (6 mm x 6 mm) = 36 mm²
Face 3 (6 mm x 6 mm) = 36 mm²
Face 4 (8 mm x 6 mm) = 48 mm²
Face 5 (10 mm x 6 mm) = 60 mm²
Now, add the surface area of all the faces together:
60 mm² + 36 mm² + 36 mm² + 48 mm² + 60 mm² = 240 mm²
Therefore, the total surface area of the figure is 240 mm².