3465ft.
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It is (7 + 9 + 11) ft = 27 ft.
It is: 11*7 = 77 square feet
In general when you think of a cube you think volume. Which would be 12 * 7 * 5 or 420 cubic feet. However, if you mean the area of the outer rectangles, then you need to think about each of the 6 sides. To figure out the area of each side you take the length times the width. There are 2 sides that are 12ft x 7ft - area of 74 ft each, or 148 for both There are 2 sides that are 12ft x 5ft - area of 60 ft each, or 120 for both and there are 2 that are 7ft x 5ft - area of 35 ft each, or 70 for both So the total area would be 338 square feet
It is: 7 times 3 = 21 square feet
multiply them all toether!