You will need a minimum of 38.6 square yards of carpet to cover that area.
You will need 7.1 square yards of fabric.
2 yards
The width 12 feet is four yards, so the area would be 4 yards * 50 yards = 200 square yards. You would need 200 square yards of carpeting to cover that area.
To cover that area to that depth - you would need just under 8 cubic yards of soil.
47.55 cubic yards . 4" would be 5.23 cubic yards.
You will need a minimum of 38.6 square yards of carpet to cover that area.
At 4 mph, you would cover 88 yards in one minute. In 45 seconds, you would cover 66 yards (88 multiplied by 0.75).
You will need 7.1 square yards of fabric.
2 yards
You would need 31.88 cubic yards of topsoil to cover 855 sq feet at 6 inches deep.
20 feet x 20 ft x .3333 ft = 133.33 cubic feet / 27 cubic feet per yard = 4.94 cubic yards
The width 12 feet is four yards, so the area would be 4 yards * 50 yards = 200 square yards. You would need 200 square yards of carpeting to cover that area.
577 yards.
38.67 square yards, 40 to be on the safe side.
8.25 cubic yards of concrete
To cover that area to that depth - you would need just under 8 cubic yards of soil.