On Tue, 2011-08-23 at 21:50 +0100, Colin Law wrote: > > So if you say, for example, 1½ day, you always mean 36 hours? > > 1½ days does mean 36 hours Customer: "How long does it take to complete that work?" Plumber/carpenter/worker: "I need 1½ day of work" 1½ day = 12 hours (assuming 1 day of work = 8 hours) :-)