Depends on the cut.
There are many cuts of beef roast and they all have different cooking times.
Tougher cuts require longer cooking times at lower temperatures, tender cuts like prime rib are generally cooked at higher temperatures for shorter times and then "rested" (turn the oven off, leaving the door closed) and then turn the oven back up about 30-40 minutes before you serve it. Tougher cuts like chuck, butt, etc. will probably need to be roasted for 8 hours or more.
about 4 and a half hours on 325-350 degrees
Roasting it at 325 degrees for about 2 1/2 hours should do it nicely.
Yes, an 8 pound roast (uncooked weight) should feed 13 people.The roast will loose weight during cooking.Even so it should yield about 7oz to 8oz of cooked meat per person.
1st and Ten - 1984 A Roast Is a Roast 7-13 was released on: USA: 26 December 1990
Pork CutsThere are different systems of naming for cuts.. British cuts of porkAmerican cuts of porkHead - This can be used to make brawn, stocks and soups. After boiling, the ears can be fried or baked and eaten separately.Spare rib roast/spare rib joint/blade shoulder/shoulder butt[11] - This is the shoulder and contains the shoulder blade. It can be boned out and rolled up as a roasting joint, or cured as "collar bacon". It is not to be confused with the rack of spare ribs from the front belly. Pork butt, despite its name, is from the upper part of the shoulder. The Boston butt, or Boston-style shoulder, cut comes from this area, and may contain the shoulder blade.Hand/arm shoulder/arm picnic[11] - This can be cured on the bone to make a ham-like product, or used in sausages.Loin - This can be cured to give back bacon or Canadian-style bacon. The loin and belly can be cured together to give a side of bacon. The loin can also be divided up into roasts (blade loin roasts, centre loin roasts, and sirloin roasts come from the front, centre, or rear of the loin), back ribs (also called baby back ribs, or riblets), pork cutlets, and pork chops. A pork loin crown roast is arranged into a circle, either boneless or with rib bones protruding upward as points in a crown. Pork tenderloin, removed from the loin, should be practically free of fat.Fatback - The subcutaneous fat and skin on the back are used to make pork rinds, a variety of cured "meats", lardons, and lard.Belly/side/side pork - The belly, although a fattier meat, can be used for steaks or diced stir-fry meat. Belly pork may be rolled for roasting or cut for streaky bacon.Legs/hams - Although any cut of pork can be cured, technically speaking only the back leg is entitled to be called a ham. Legs and shoulders, when used fresh, are usually cut bone-in for roasting, or leg steaks can be cut from the bone. Three common cuts of the leg include the rump (upper portion), centre, and shank (lower portion).Trotters - Both the front and hind trotters can be cooked and eaten, as can the tail.[13]Spare ribs, or spareribs, are taken from the pig's ribs and the meat surrounding the bones. St. Louis-style spareribs have the sternum, cartilage, and skirt meat removed.Knuckles, intestines, jowls and all other parts of the pig may also be eaten.Feijoada, the national dish of Brazil (also served in Portugal), is prepared with pork trimmings: ears, tail and feet.[14]
The Simpsons - 1989 Gump Roast 13-17 is rated/received certificates of: Argentina:Atp USA:TV-PG
The picnic ham is not really a true ham (ham comes from the pig's back leg), the picnic ham is taken from the upper part of the foreleg and includes a portion of the shoulder. This cut is also more accurately referred to as the picnic shoulder or pork shoulder. The picnic ham is smoked, and has a very hamlike flavor. The bone is often removed. Though it's slightly tougher and requires longer cooking and has more waste because of the bone structure. A picnic ham is a good, inexpensive substitute for regular ham.
Good Eats - 1999 Tender Is the Pork 13-4 was released on: USA: 25 May 2009
Kelsey's Essentials - 2010 Pork Four Ways 4-13 was released on: USA: 2013
Sing for Your Supper - 2013 Pork Tenderloin with the Mavericks 1-13 was released on: USA: 30 November 2013
Ugly Americans - 2010 The Roast of Twayne the Boneraper 2-13 was released on: USA: 28 March 2012 Hungary: 10 July 2012
See Dad Run - 2012 See Dad Roast the Toast 2-13 was released on: USA: 19 January 2014
As a rule of thumb you should cook chicken for 20 mins for each pound plus an extra 20 mins, oven temp 190C.