11/2
You need10.8/(the number of cubic feet of sand in each bag) bags.
In your sand sample, what is the average weight of a grain?
5000 lbs of sand, give or take a hundred.
4
11/2
how deep?
That depends on the dimensions of the bags. You can't equate weight to area or volume. A 50 pound bag of feathers is a lot bigger than a 50 pound bag of sand.
The answer will depend on how big (or small) the bags of sand are!
it is 100 bags of sand/ballast
The volume of sand weighs 455x 2/12 *100 pounds per cubic foot = 7600 pounds so you need about 152 bags.
65 BLOCKS PER 74 POUND OF MORTAR (THAT YOU ADD SAND TO) 80 POUND PREMIX MORTAR JUST ADD WATER 27 BLOCK 8X8X16
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.
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
0.96*1,000,000/25 = 38,400 bags.