It usually takes 30 minutes to roast beef in the oven, because the beef can reach 7% maturity after being fried for 10 minutes. Do not fry or bake 10 minutes, it looks like it is 5% cooked, and after more than 30 minutes, it is fully cooked and ready to eat. Oven is a sealed electrical appliance used to bake food or dry products, which can be divided into household appliances and industrial ovens.