12.96 cubic yards.
You may have mis typed your question. 1540 hundred cubic feet = 1540 cubic feet of course 154000 cu ft = 57.0 cu yards = 4361 Mega liters
First, you need to calculate the volume to be filled with concrete. Say the footer is 12" wide and 8" in height and 21 feet long. ( I picked these numbers simply to make the following arithmetic easier for me) First, change the width and height to feet. 12" = 1 ft 8" = 0.67 ft. Volume, the, = 1 ft x 0.67 ft x 21 feet = 14 cubic feet. But you wanted the volume in "yards" which is really cubic yards. To convert our cubi feet of 14 to cubic yards, simply divide it by 27. ("27" = 9ft x 9ft x 9ft, which is a cube that contains 1 cubic yard.) So, to finish up, 14 cubic feet/27 cubic feet = a little more than 1 1/2 cubic yards, so you had better order 1 5/8 cubic yards of concrete. Most places only sell by the full cubic yard, so you will have to order 2 cubic yards. Some places only sell a complete truck full, so you will have to order 8 or 10 cubic yards . . . $ that is expensive! $ You may be able to share a load with a different customer. Or, of course, you may need several trucks full . . .
There are 3 cubit feet in 1 cubit yard. Although irrelevant in this context, you may wish to know that 1 cubit = 1.5 feet = 0.5 yards.
The simplest way to is use the volume of a cylinder method. Volume = Pi x radius squared x height. Pi = 3.14 radius squared = 12 feet x 12 feet = 144 square feet height = 2.5 feet 3.14 x 144 x 2.5 = 1130.4 cubic feet Change cubic feet into cubic yards. 27 cubic feet = 1 cubic yard 1130.4 cubic feet = 41. 87 cubic yards Since you can not order fractions of fill get 42 cubic yards. I purposely did not adjust for the curvature of the bottom because I am assuming you will be compacting the fill anyway so more is needed.
200 cubic feet of space are the same as 1,496.104 gallons of space (rounded) We have no way of knowing how much water is in that space. For all we know, it may be completely empty, or filled with something else.
408 yards = 1224 feet.
7560 cubic yards of air 30 x 28 x 9 = 7560
The volume of the tank is (3 x 3 x 6) = 54 cubic feet = 2 cubic yards = 403.95 gallons.We have no way to know how much liquid may be in it at any given moment.Indeed, that number may change.
105 yards.
There are 3 feet in a yard. That gives you 466.67 yards.
5,250 feet.
3 feet per yard x 1000 yards = 3000 feet