08-15-2013, 05:22 PM
1/8 of an inch is .01041666 of a foot (1/8 divided by 12).
40 sq feet x .0104166 feet = .4166 cubic feet.
Edit: Or think of it this way -- cut the 40 Sq feet into individual 1 foot squares. They're 1/8 of an inch thick. Stack them up and you get a height of 5 inches. 5/12 = .41666.
40 sq feet x .0104166 feet = .4166 cubic feet.
Edit: Or think of it this way -- cut the 40 Sq feet into individual 1 foot squares. They're 1/8 of an inch thick. Stack them up and you get a height of 5 inches. 5/12 = .41666.