first what u do is u divide the 12 with a 2 then u get 6 then u do 3.14x(6^2) and u get 113.1 then u divide 16 by 2 and u get 8 once u got your 8 u do 3.14x(8^2) and u get 201.06 then u minus 113.1 with 201.06. Thus there is about 87.96 inch of diffrence
