Well it's about 13m exp to a 99 melee stat. For the sake of it, let's say you fight 100 hp monsters the entire way as an average. 13m/100=130,000 monsters. Now if each bone takes 2 seconds to bury, that's 130,000 x 2=65,000 seconds. There are 60 seconds in a minute so 65,000/60=1083.3 minutes. There are 60 minutes in an hour so 1083.3/60=18.05 hours wasted by picking up every bone on the way to a 99 melee stat. But the exp is 130,000 x 4.5=585k expierience. Now divide that by the 18.05 hours it took for that exp and that's 32,409 exp per hour. Now i'm sure we all know that prayer rates using a gilded altar and dragon bones is a hell of a lot more exp than that.