If you do the Aeronautical Science degree you have to get your Private, instrument, commercial, multi, cfi, cfii in order to graduate. The number of hours you get really depends on how long it takes you to complete the courses. I am currently working on my CFI at Riddle and just hit 200 hours. I believe that the average would probably be close to 250, but it all depends on how hard you work.
Not exacly. You do not have to take your CFI/II at riddle in order to grad w/ an Aero Sci degree, including Airline pilot area of concentration. I would agree it would be about 250 hours to comm inst multi.