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.
Leg of lamb is a thick cut, making it best suited for roasting. Roast bone-in leg in a 325 degree Fahrenheit oven for 20 to 25 minutes per pound (or until a meat thermometer measures 145 degrees Fahrenheit) for medium rare.