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If it is 4 inches deep/thick, 2 cubic yards. If it is 6 inches deep/thick, 3 cubic yards.
2.15
30.81 cubic yards
14.81 yds
you can do the math: LXWXD DIVIDED BY 27
A 9x9 foot slab 4 inches thick requires a minimum of 1 cubic yard. If you go to 6 inches thick you will need 1.5 cubic yards.
If it is 4 inches deep/thick, 2 cubic yards. If it is 6 inches deep/thick, 3 cubic yards.
2000 pounds.
3 yards @ 54'' wide
540 square feet
55
12.5 cubic feet. Assuming you meant 4 INCHES thick..
2.15
2560 sq feet 2 inches thick
14.81 yds
30.81 cubic yards
That's 2.4691 cubic yards. (rounded)