Question 254187
Is there a drawing or diagram or more information?

There is not enough info to know where town c is in relation to town A and B
they could be arranged 
C A B or A B C  all in a straight line or C could be i mile from A and equidistant A to B and C to B

If you are trying to say that A and B  are the legs of a right triangle and c is the hypotenuse you failed.
C could be any side of the triangle. 
The hypotenuse will be the longest side of a right triangle.
Very poorly worded problem.  Grade of F- to whoever made this problem.