No because the perimeter of a rectangle is L×W or (2L+2W) , but the perimeter of a square is S×S×S×S so there is a difference between the two.
Each slice would cost 0.40¢.
This is because 2.40/6=.40
I found two using a little C# program:
9,10,11,12,13,14,15,16
and
18,19,20,21,22
(if you're interested in the program drop me a msg)
perimeter=2(85)+π(12.5)=220+2×12.5π
=170+25×3.14
=170+78.5
=248.5
distance ran=3×248.5=745.5 yards.
i hope this work for you