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Q: How many yards of concrete will be needed to fill in 400 square feet?

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37 yards of concrete is needed for a 3000 square feet 4 inches thick.

how may yards of concrete are needed for a floor 24 x 25 feet?

For 576 square feet at a depth of 4 inches, you will need 7.11 cubic yards.

123.44 cubic yards

How thick? Gotta have thickness to calculate cubic yards.

90

For a 4-inch depth you will need 7.41 cubic yards.

1350/depth of the concrete in feet

The answer depends on whether you mean 114 feet squared or a square 114 feet by 114 feet. The answer to the first scenario is 76 square yards of concrete. The answer to the second scenario is 8,664 square yards of concrete.

For 100 yards of concrete for your new driveway it is 2700 square feet.

1000 square feet/9 = 111.1 square yards of concrete 6 inches thick. This is the same as 111.1/4.5 = 24.7 cubic yards of concrete.

One square yard is nine square feet, so 27 square feet is equivalent to 3 square yards. So 3 yards of concrete will cover 27 square feet.

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