Oops . . . please repost your question and include the depth of the concrete. You have to have all 3 dimensions in order to calculate volume (Cubic Yards of concrete).
A minimum of 1.3 cubic yards.
To calculate the volume of concrete needed for a slab that measures 74 inches long, 48 inches wide, and 4 inches thick, first convert the dimensions to feet: 74 inches = 6.17 feet, 48 inches = 4 feet, and 4 inches = 0.33 feet. Then, multiply the dimensions: 6.17 ft × 4 ft × 0.33 ft = approximately 8.16 cubic feet. Therefore, you will need about 8.16 cubic feet of concrete for the slab.
12 ft x 10 ft x .333 ft (4 in) = 39.96 cu ft. You need enough concrete for 40 cubic ft.
go to any search. and type in concrete calculater
about 432 cubic inches
None, as a hole which is 6 inches wide and 42 inches long has no depth and thus no volume.
12.30 cubic yards
you would need 37.33 yards of concrete or 38 to be safe
If the post is a 6 x 6 you will need about 1/10 of a yardof concrete
A minimum of 1.3 cubic yards.
What you need to do first is to check if you have that room near the threshold of the door for that extra concrete(which is minimum of 3.5" inches) then you need to remove the top surface of the old concrete to be rough surface don't break too much just about an 1"wash clean and let it dry and only then to install the new concrete.
For a 1000 sqft slab with a thickness of 4 inches, you would need approximately 33 cubic meters of concrete. This calculation is based on the assumption that 1 cubic yard of concrete covers 81 square feet at 4 inches thick.
12 ft x 10 ft x .333 ft (4 in) = 39.96 cu ft. You need enough concrete for 40 cubic ft.
12 ft x 10 ft x .333 ft (4 in) = 39.96 cu ft. You need enough concrete for 40 cubic ft.
(60 x 1.5 x 13/12) / 27 = 3.61 cubic yards
you will need about 4 cuyds for your project.