Question 1128068
The stone will be shaped into a rectangular prism
{{{200}}}{{{ft}}} wide,
{{{4000}}}{{{ft}}} long, and
{{{(8inch)(1ft/"12 inch")=2/3}}}{{{ft}}} high.
The volume, in cubic feet of that amount of stone is
{{{200*4000(2/3)}}}
 
{{{1}}}{{{cubic}}}{{{yard}}}{{{"="}}}{{{(1yard)(1yard)(1yard)=(3ft)(3ft)(3ft)}}}{{{"="}}}{{{27}}}{{{cubic}}}{{{feet}}} .
In other words, {{{1}}}{{{cubic}}}{{{foot}}}{{{"="}}}{{{1/27}}}{{{cubic}}}{{{yard}}} ,
so in cubic yards the volume of stone needed is
{{{200*4000(2/3)(1/27)=about19753}}} ,
and the weight of that much stone, in pounds, will be
{{{200*4000(2/3)(1/27)1950="38,518,519"}}} .
 
An american ton (or short ton) is 2000 pounds,
so in USA and Canada we would say that the stone for the parking lot would weigh
{{{200*4000(2/3)(1/27)1950(1/2000)}}}{{{"="}}}{{{about}}}{{{"19,259"}}}{{{tons}}}
If I had to order it, I would order 20,000 tons.
 
NOTE:
The metric ton, and the UK long ton are different units.