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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

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Q: What is the area of 12 feet 7 feet and 5 feet?
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