The function of the speaker it to talk about the topic for which s/he was engaged, or to the common interest of the group. If you mean an electronic device, a speaker is to â¦ amplify sound. 2 people found this useful.
How long it takes to cook a leg of lamb depends on how you well you  like the meat cooked. If you like it rare, it takes about 15  minutes per pound, if you like it medium i â¦ t takes about 25 minutes  per pound, and 30 minutes for well done.
As a rule, roast a leg of lamb for 15 minutes per 500g (1 1/4 lb), plus 10 minutes more. Allow it to rest for a good 15 minutes before serving to ensure the juices redistribute, making a perfect roast.Pushing sliced garlic into a leg of lamb can be time consuming.s a rule, roast a leg of lamb for 15 minutes per 500g (1 1/4 lb), plus 10 minutes more. Allow it to rest for a good 15 minutes before serving to ensure the juices redistribute, making a perfect roast. Pushing sliced garlic into a leg of lamb can be time consuming.