At 12" depth, 20 tons of gravel will cover 360 sq ft.
It depends how deep you want the gravel to cover, if you want it to be 2 inches deep it's going to cost more than 5 inches. Also it depends how big the gravel is cut, I think that the smaller the gravel is the more it costs.
its really big.. picture it.
The oceans cover an area of 71% of the Earth's surface.
Depends on how big the tiles are.
W-A-Y too big a question to be covered here. There are tons of books (fiction/non-fiction and textbooks) which cover this subject. Try a search engine.
It could cover an area of 1500 miles by 1500 miles
The Big Ben mechanism weighs 5 tons.
Yes there are filters for this product. They are not reuseable. The purifier can cover an area of up to 2000 sq. ft.
how big is a dvd cover
it rather depends on how thick a layer you put down.
It depends on how big a sheet of plywood you are talking about.
One cubic yard of gravel typically occupies a space of about 27 cubic feet. When piled, it generally forms a mound that's about 3 feet high and covers an area of roughly 9 square feet, depending on the shape and compaction of the pile. The exact dimensions can vary based on the size and shape of the gravel particles.