That depends on how deep you want to spread it.
On that area, it takes 0.463 cubic yards for every inch deep.
5.55 cubic yards of gravel
To determine how many bags of 5 cubic feet of gravel are needed for a 3x50 area, first calculate the total volume of gravel required. The area is 3 feet wide and 50 feet long, giving a total volume of 150 cubic feet (3 ft x 50 ft). Dividing this by the volume of each bag (5 cubic feet), you would need 30 bags of gravel (150 ÷ 5 = 30).
30 feet = 9.144 metres
30 yards=90 feet
30 meters = 98.42 feet
5.55 cubic yards of gravel
2.15
30 feet = 9.144 metres
None. You have only given an area and no depth. Without a depth, the volume is zero and thus the hole does not exist and no gravel will be needed. If you meant a round hole 12 ft by 14 ft it is still unclear as to the dimension of the hole: firstly which is the depth (the 14 ft is the most likely), but when speaking of a round hole would you mean the perimeter, the radius or diameter for the given measurement? They all lead to different volumes and hence difference amounts of gravel needed to fill the hole. Ans 3 - 12 x 14 is NOT round it is rectangular
if you mean a 30 foot diameter circle, then pi x 152 x 3 = 2119.5 cubic feet of dirt
30 yards=90 feet
30 meters = 98.42 feet
If you multiply 30 x 16 you should get a good approximation...
22.5
2.5 feet are in 30 inches.. ≈1 foot is in 30 centimeters. 90 feet are in 30 yards. 3o in,m,mi,etc.?
30 acres is 1,306,800 square feet.
Of what?