Strangely enough, 8.1 inch3 is exactly equal to 8.1 cubic inches.
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81
27 cubic feet = 1 cubic yard4 inches = 1/3 foot(81 square feet) x (1/3 foot) = 27 cubic feet = 1 cubic yard
One cubic yard covers 81 square feet 4 inches thick.
Since a foot has 12 inches, a cubic foot has 123 cubic inches, equal to 1728 cubic inches.Since a foot has 12 inches, a cubic foot has 123 cubic inches, equal to 1728 cubic inches.Since a foot has 12 inches, a cubic foot has 123 cubic inches, equal to 1728 cubic inches.Since a foot has 12 inches, a cubic foot has 123 cubic inches, equal to 1728 cubic inches.
Just a shade less than 1 cubic yard ... it happens to be 0.987654321 (rounded). How did you do that ? ! ?If the area were 81 square feet, by 4 inches thick, that would be exactly 1 cubic yard.