content: The question was rhetorical, but now you've got me thinking.  But I came up with a different figure.  230 * 60 = 13,800 (total minutes spent watching ads) 9 out of every 30 minutes are ads, so 9/30, which reduces to 3/10, or .3 Total number of minutes spent watching TV x .3 = 13,800 so 13,800 / .3 = 46,000 minutes 46,000 / 60 = 766.667 hours  or 766 hours and 40 minutes