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.
Quick Answer. The length of time it takes to cook lamb depends on the cut of the meat and how much that cut weighs; for example, a 5- to 7-pound bone-in leg of lamb roasted at 325 degrees Fahrenheit to medium rare, or 145 F, takes between an hour and 40 minutes to slightly less than 3 hours.