Question: how long does it take to cook a kilo of beef?
Answer: Roast the beef for 50 minutes per kilo for medium-rare, or a temperature between 125 and 130 F. Roast the beef for 60 minutes per kilo for medium, or between 130 and 135 F. Roast the beef for 1 hour and 10 minutes per kilo for medium-well, or an internal temperature of 135 and 145 F.