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.
Season meat with salt and pepper. Roast lamb, basting every 20 to 30 minutes, first with the reserved marinade, and then with juices that accumulate in the pan. The lamb will need to cook for about 20 minutes per pound (2 hours for a 6-pound leg of lamb, and 2 hours and 40 minutes for an 8-pound leg of lamb).An instant-read thermometer inserted in the thickest part of the meat, not touching the bone, should read 145Â° when the lamb is medium-rare. 5.nsert thermometer in the thickest part of the meat, not touching fat or bone. Roast in a preheated 325Â° oven for about 25 to 30 minutes per pound, or until meat thermometer registers 150Â° to 175Â°, depending on how well you like it done.