The answer depends on
How many square feet will a ton of salt cover?
9 square feet.
Take the sq foot and divide by 140 if you want the stone apx. 2" deep.
190
1,440 square feet or 160 square yards.
1 cubic yard covers 27/depth in feet square feet.
36
How many square feet will a ton of salt cover?
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
A bundle of Shingles will cover roughly 33 square feet. A square of Shingles (3 Bundles) will cover 100 square feet.
9 square feet.
240
it will cover 3 cubic feet, or 9 feet, I am not sure how many square feet
Take the sq foot and divide by 140 if you want the stone apx. 2" deep.
400 Square Feet.
190
1,440 square feet or 160 square yards.