20 times 50 divided by three is 333 1/3
9.3 cubic yards of cement is required for this slab.
5 yds - One yard of concrete will cover approximately 81 square feet 4" deep.
106.67 Cubic Yards
20 feet x 20 ft x .3333 ft = 133.33 cubic feet / 27 cubic feet per yard = 4.94 cubic yards
0.246914 cu. yards (6.666667 cu. ft ) of concrete is needed.
That depends on how DEEP you want the concrete !
66.666 square yards
For an area that is 20ft by 20ft and you want to add 6 inches of topsoil, you will need 20 cubic yards of topsoil. Topsoil is typically ordered by the cubic yard, so this measurement will ensure that you have enough to cover the entire area with a 6-inch layer.
20ft*4ft = 80 sq ft = 80/9 sq yards = 8.88... sq yards.
Cannot answer the question with out the depth dimension. If you are talking about square yards then 20x5 = 100 square feet, divided by 9 = 11.11 square yards,
15ft x 20ft= 5yards x 20/3yards 100/3 sq yards =33.3333333333 sq yards
20ft x 10ft x 7ft = 1400 cubic feet 1 yard of dirt = 27 cubic feet Hence yards required = 1400/27 = 51.85