Question 1207439
.
A circular pool measures 10 feet across. One cubic yard of concrete is to be used 
to create a circular border of uniform width around the pool. If the border is 
to have a depth of 3 inches, how wide will the border be? (1 cubic yard is 27 cubic feet).
I need the set up here.

Thanks.
~~~~~~~~~~~~~~~~~~



            In the post by  @Theo,  everything is  WRONG.



It is wrong,  since  @Theo systematically uses in his post incorrect value of  1/3  of a foot 
as the height of the cylinders,  which corresponds to  4  inches.


The correct value of the height of the cylinders in this problem is  3  inches  (given), 
which is  1/4  of a foot.