It depends on the kind of sand you're talking about.
There are five different types of sand, ranging from very fine to very course. Let's take the middle type of sand, which is medium sand.
A grain of medium sand is between 1/50 of an inch and 1/100 of an inch. If you take the middle number between that range (~1/67), then we can estimate that a square inch of sand would have approximately 4500 grains of sand (67 squared is 4,489). This assumes a completely flat layer of sand one grain deep.
A cubic inch of such sand would have just over 300,000 grains of sand.
Obviously this number will vary based on the type of sand you're working with and can only be used for estimation purposes.
IMPROVEMENT:
Hmmm, first of all, the "middle number" would seem to be 1/75, not 1/67. Let's take 1/75.
Second, the packing could be much denser than what the computation above seems to assume. With a denser packing of the grains of sand, a computation shows a shade less than 600,000 grains of 1/75" sand in a cubic inch.
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It depends on grain size, which can be as small as 0.004 inch or as big as 0.1 inch. If we take an average grain size of 0.02 inch diameter that is 0.00000043 cubic inch volume and a cubic foot is 1728 cubic inches then (not considering packing voids) that is 1728/.000000 = 4 billion grains!
Since about 20 grains of sand lined up is 1cm, then I can use the volume formula (bwh) and subsitute in 20 grains of sand. 20*20*20=8000. There are about 8000 grains of sand in a cubic centimeter.
Too many to count.
1 billion = 1091 lakh = 105So, 104 = 10,000 lakhs make 1 billion.And it can be rupees or grains of sand.1 billion = 1091 lakh = 105So, 104 = 10,000 lakhs make 1 billion.And it can be rupees or grains of sand.1 billion = 1091 lakh = 105So, 104 = 10,000 lakhs make 1 billion.And it can be rupees or grains of sand.1 billion = 1091 lakh = 105So, 104 = 10,000 lakhs make 1 billion.And it can be rupees or grains of sand.
You need to know how deep you want the sand.