Surface area of a 3 inch square is 54 inches.
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The area of a 3-inch square is: 9 square inches.
The bulk of the question is irrelevant ! If all you need is the surface area of the 3-inch cube, simply multiply 3 x 3 x 6 to give 54 square inches !
Well, isn't that a happy little question! To find the surface area of a cube, you simply need to calculate the area of all six sides and add them up. Since all sides of a cube are the same, you can find the area of one side by squaring the length of one side. So, for a 3-inch cube, the surface area would be 6 sides x (3 inches x 3 inches), which equals 54 square inches. Happy painting!
The answer depends on the units used for 3 X 8. It should, for example, be obvious that the number of square inches in a 3 inch x 8 inch shape will be different to the number of square inches in a 3 foot x 8 ft area.
Total surface area = 2*(12*8 + 8*3 + 3*12) = 312 square inches.Total surface area = 2*(12*8 + 8*3 + 3*12) = 312 square inches.Total surface area = 2*(12*8 + 8*3 + 3*12) = 312 square inches.Total surface area = 2*(12*8 + 8*3 + 3*12) = 312 square inches.