Answer
About $4.07$ in.
Work Step by Step
You are hanging fliers around a cylindrical kiosk that has a
diameter of 5 feet: $5\times12\times\pi$
You want to hang 15 fliers that are 8.5 inches wide: $15\times8.5$
To know how far apart the fliers should be, use the following expression:
$\frac{5\times12\times\pi-15\times8.5}{15}=\frac{60\pi -127.5}{15}\approx 4.0663\approx4.07$
