Error in math problem in official ACT booklet?

EternalSnow
Mon, 03 Oct 2011 04:23:28 +0000

I solved that problem
The first station has 52mi radius circle for the transmitter site and the second station has 60 mi of transmitter site. they are on the other ends of straight highway, 100mi long.
100 - 60 is 40, meaning that the second station is covering from 40mi away from the first station.
and 52 - 40 is 12.
so the answer is 12 mi, letter G.
My explanation looks bit vague.
Let me know if you need further explanation…