You need10.8/(the number of cubic feet of sand in each bag) bags.
120 50-pound bags.
4
11/2
It depends upon the size of the bags, the density of the sand, and the depth of sand. For example, if the density is 100 lbs/cubic foot, the bags are 50 lbs each, and you want a depth of 1 inch, then: 31.25 sq ft X 1 inch X 1/12 ft/inch X 100 lbs/cubic foot / 50 lbs/bag = 5.2 bags Better get 6 bags to have enough. If the depth of sand, density of sand, or size of bags is different than what I assumed for this example, then plug your numbers into the equation above.
The answer will depend on how big (or small) the bags of sand are!
it is 100 bags of sand/ballast
It depends on the weight of the sand, but on average, a 50 lb bag of sand equals approximately 0.0227 cubic meters. So, roughly there would be around 44 bags in 1 cubic meter of sand.
19.5
You need10.8/(the number of cubic feet of sand in each bag) bags.
0.96*1,000,000/25 = 38,400 bags.
Sand bags are bags that can be used in many different areas such as war or just a simple thing to design certain things like carts or stores or the navy.
120 50-pound bags.
4
7 bags per 1000 on mortar mix and half a truckload of "mortar" sand aught to do it.
11/2
F = W = ( 20 bags ) ( 50 lbf/bag ) ( 4.4482 N / lbf ) = 444.82 N <---[ Answer ]-------