The answer will depend on the depth of the soil cover.
48x32 what and to what depth.
You would need 3,355 cubic yards of soil to cover 6 acres at 24 inches deep.
one ton equals one cubic meter of soil was 100mm deep it would cover 7sqm
You would need about 1 cubic yard of topsoil to cover a 200 square foot area with 1 inch of soil.
The answer depends on the thickness of the covering layer. That, in turn will depend on what the soil is for: lawn will require less depth than flower beds.
enough to cover it
there is sand
3600 / 12 = 300 tons
easy, a bunnings warehouse soil cover.
Soil cover earth's land surfaces
It depends on the depth at which you spread the topsoil. For example, if you spread it at a depth of 1 inch, 40 pounds of topsoil will cover approximately 10 square feet.
To cover that area to that depth - you would need just under 8 cubic yards of soil.