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.
Medium Rare. Cooking your leg of lamb to a medium-rare finish, with a pronounced pink hue to the meat, means the internal temperature should reach 145 degrees F. With your oven preheated at 325 degrees F, you will cook the lower leg half (called the shank) for 25 to 30 minutes per pound.