how many square feet (4 inches thick)can 1 cubic yard of concrete cover?

Answer 1

V = Ah
1 y3 = A x 4"
(3 ft)^3 = A x 4/12 ft
(27) ft3 = A x (1/3) ft
A = 81 ft2

Answer 2

1 cubic yard (27 cubic feet), is a cube that is 36 inches per side, or 46656 cubic inches.

This means that all three sides are the same. Say that one side is different, and the other two sides are the same (we'll call those 'y') with the one we'll call 'x'.

So, we have x*y^2. Doesn't look like much, but if our 'x' is the 4 inches, and we know the total volume is the same then we can work with it.

4y^2 = 46656 cubic inches (volume)

==> y^2 = 11664 square inches (area)

==> y = 108 inches (linear measure)

Note the way the dimensions change as we went along.

So, apparently if you have a depth of 4 inches, you can cover a square area that is 108 inches (9 feet) per side.....an area of 81 square feet as some others have posted.

To check this, take 4" x 108" x 108"

I get 46656 (cubic inches), so it checks.

:)

Answer 3

Well, first get common units... 1 cubic yard = 27 cubic feet 4 inches = 1/3 foot Since Volume = Base * height, where Base is in square units, you can substitute in the values to get: 27 = B * 1/3 By multiplying both sides by 3, you get: B = 81 square feet Hope this helps.

Answer 4

a cubic yard of concrete is 3' x 3' = 9 sq ft in area on top here and then 3 ft deep. 3 ft equals 36 in. Since each slab is 4' thick there are 36/4 = 9 slabs. So we have 9 slabs each covering 9 sq ft = 9x 9 sq ft = 81 sq ft in all.

Answer 5

3ftX3ftX3ft = 27 cubic feet/cubic yard

27cubic feet / 4/12 feet =

27cu ft X 12 / 4 ft = 81 sq ft

Answer 6

81

Answer 7

1 square yard = 9 square feet
3 square yard = 27 square feet = 1 cubic yard

Answer 8

1 yd^3 = 3^3 ft^3 = 27

4 inches = 4/12 = 1/3 ft

x^2 * 1/3 = 27
x^2 = 81

ANS : 81 ft^2

Answer 9

81 sq. ft.

Answer 10

^81^