6
A 9-foot piece of plywood is 108 inches long. If you cut 12-inch sections from it, you can make 9 full sections (108 ÷ 12 = 9). Therefore, there would be no plywood left after cutting the sections, as the entire length would be used up.
Nor sure how pee gravel is packed, but you need enough for 64 cubic feet.
How much? what kind of plywood floor? Why do you need to do this??
There is 32 sq ft in a 4 by 8 sheet of plywood. You would need at least 21 sheets to cover the roof.
You need 13 yrd's of fill
17.15
A 3x6 plywood sheet typically weighs around 25-30 pounds, depending on the thickness and type of plywood.
You need a test kit
$384
You will need 12.5 sheets of 4x8 plywood.
About 6,042 gallons of water.
A sheet of plywood is 4' x 8'. It would take 2 sheets long (16'), and 4 sheets wide (16'), for a total of 8 sheets, with some scrap left over. Since you can't buy plywood in other sizes, really, it would take 8 full sheets.