I have to guess at a lot, because you did not give enough information. Is this 11 feet x 11 feet x 1 foot? That is what I will assume. Sand has a density of about 2.7.
So: 11 x 11 x 1 x 62.4 x 2.7 /50 = 407.7216 bags so about 408 bags
bags of what?
That would depend on the density of the bags of topsoil.
I don’t know
20 bags. 16 oz are in a pound. 10 X 16 = 160 160/8 = 20
One pound is 16 ounces, so you can fill 2 8-ounce bags from each pound of mix. With 10 pounds of trail mix, you can fill 20 8-oz bags. Well, 19, since you're probably eating trail mix while you're filling the bags, and you'll have eaten one bag's worth while you worked.
One pound is 16 ounces, so you can fill 2 8-ounce bags from each pound of mix. With 10 pounds of trail mix, you can fill 20 8-oz bags. Well, 19, since you're probably eating trail mix while you're filling the bags, and you'll have eaten one bag's worth while you worked.
1 50kg bag fill about 2 cubic f. so for 102cu.f. you'll need 51 bags
10 bags. Each 80 lb bag is 0.6 cubic feet, and your hole is 6 cubic feet.
air
ABOUT 43 bags. Dry sand weighs ABOUT 100 lbs per cubic foot- and you need 21.3 cubic feet.
Fill them with shopping
50lb bags 3.7 60lb bags 3.1 80lb bags 2.3 90lb bags 2.1 These amounts are for using the redi-mix bags.