4.5 x 9 x 1.5 = 60.75 cubic feet
An area measuring 14 x 8 x 2 feet contains: 8.296 cubic yards.
The volume of an area 24 feet round and 45 inches deep is: 1,700 cubic feet.
60 cubic feet
5200 cubic feet
It depends on how deep it is.
Assuming you mean a cubic construct that is 24 feet long by 1 feet wide by 2 feet deep, the answer is 48 cubic feet (24x1x2).
One cubic yard of mulch will cover approximately 160 square feet at 2" deep, so you would need approximately two cubic yards of mulch to cover 271 square feet at 2" deep.
240 x 3 /12 Cubic feet = 60 cubic feet
A 15,000-gallon pool has a volume of about 2,005 cubic feet.
That's going to depend on how deep or shallow you spread it. If you spread it one foot deep, it covers an area of 2 square feet. If you spread it one inch deep, it covers an area of 24 square feet.
That depends on how deep you want to spread it. On that area, it takes 0.463 cubic yards for every inch deep.
Volume = (base area) x (height) = 300 cubic feet = 111/9 cubic yard.