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.
Baste each 25 minutes. When the lamb â¦ is cooking well, turn the oven down to 175C (350F). When the meat is done to your liking, remove to a serving dish, cover with foil or the dish's own cover, and leave to rest for about fifteen minutes.he general rule for lamb is, for every kilogram of weight, cook for an hour at 190 - 200 degrees Celsius, depending on the efficiency of your oven, or 180 degrees for a fan-f â¦ orced oven. Thus, a 2kg leg of lamb will take two hours.