If the question refers to 2" x 4" then there are 2 x 4 = 8 sq in.
If the question refers to 2' x 4' (i.e. the lengths are in feet) then there are :
2 x 12 x 4 x 12 = 1152 sq in
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The sum of all the areas of the surfaces of a solid figure. for example, a cube with dimensions 2 inches x 2 inches x 2 inches has a surface area of 24 square inches (4 square inches + 4 square inches + 4 square inches + 4 square inches + 4 square inches + 4 square inches...6 sides with an area of 4 square inches)
576 square inches = 4 square feet= 576 square inches * 1 square foot/(12 inches)2=576square inches*1 square foot/144square inches= 576/144 square feet= 4 square feet
2 inches x 2 inches = 4 square inches
4" x 8" = 32 square inches
576 of them