0.246914 cu. yards (6.666667 cu. ft ) of concrete is needed.
They are the same.
8 inches = 8/12 ft = 2/3 or .66 ft 20ft X 21ft = 420ft2 X .66ft or 2/3ft = 280ft3 (feet cubed )
20ft X 14ft = 280 sq ft /9 = 31.11sq yds X $3.00 = $93.33
680
Lots
5 yds - One yard of concrete will cover approximately 81 square feet 4" deep.
That depends on how DEEP you want the concrete !
9.3 cubic yards of cement is required for this slab.
631cm = 20ft 827⁄64in
242/12, ie 20ft 2 in
google it people thats y its there smart ones
20 feet x 20 ft x .3333 ft = 133.33 cubic feet / 27 cubic feet per yard = 4.94 cubic yards
106.67 Cubic Yards
20 times 50 divided by three is 333 1/3
840 in (12 x 2 x (20 + 15))
20ft
The answer will depend on the size of the tiles.