First of all, is this some kind of new language? It's bad enough to have to learn all the construction lingo, could we have the answers in plain English? If your question is: how many parts of cement and gravel you mix to 4 parts of sand, the answer is easy . . . 2 parts cement, 6 parts aggregate, 4 parts sand.
slugs need rocks,branches,moss,soil and gravel.(fish gravel will do)
1 square km of gravel
1 cement 2 sand 3 gravel
No. Portland has convenient public transportation.
To properly answer this question, one would need to know the volume of a "bag", since "bag" isn't any standard of volume or weight. Typical Portland Cement has a density to 1505kg / cubic meter. In addition, one would also need to know the coarseness of the gravel, as the ability of the sand and cement to fill in the aggregate depends heavily on the average size of the gravel pieces.
You will need 0.309 cubic yards (about 600 pounds) of gravel.
I need to know how thick the layer of gravel is meant to be.
1
No plants or flowers will grow in gravel , they need soil to grow.
You would need about 13 cu yards or about 15 tons.
To cover 300 square feet 4 inches thick, you would need approximately 3 cubic yards of gravel.
Can't answer unless we know the depth of the gravel and width of the area.