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.
For quick roasting, preheat the oven at 200C/400F/Gas mark 6, then allow 35 minutes per 450g/1lb plus an extra 20 minutes. Thus, an 800g lamb leg will be done in about 80 minutes. For slow roasting, preheat the oven at 180C/350F/Gas mark 4, then allow 35 minutes per 450g/1lb plus an extra 35 minutes.An 800g will be done in approximately 95 minutes. Learn how to roast a leg of lamb at The Kitchn.Try leg of lamb recipes at any of these sites: AllRecipes UK BBC Food Tip!or slow roasting, preheat the oven at 180C/350F/Gas mark 4, then allow 35 minutes per 450g/1lb plus an extra 35 minutes. An 800g will be done in approximately 95 minutes. Learn how to roast a leg of lamb at The Kitchn. Try leg of lamb recipes at any of these sites: AllRecipes UK BBC Food Tip!