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AL2006idn

The top and bottom faces are each 4-ft by 4-ft. 
Their areas are each (4 x 4) = 16 ft².
Total for top and bottom faces = (2 x 16 ft²) = 32 ft².

All four side-faces are 4-ft by 10-ft.
Their areas are each (4 x 10) = 40 ft².
Total for the four side faces = (4 x 40 ft²) = 160 ft² .

Total area of      (top and bottom) + (4 sides) =

                                      32 ft²   +   160 ft²   =   192 ft²
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