How long to cook 3 pound oven roast beef?

I need more information to give you an accurate cooking time for a 3-pound oven roast beef! Here's what I need to know:

* What cut of beef is it? Different cuts of beef have different cooking times. For example, a chuck roast will take longer than a tenderloin.

* What temperature do you want it cooked to? Rare, medium-rare, medium, or well-done? This will significantly impact the cooking time.

* What method are you using to cook it? Are you roasting it in the oven, using a slow cooker, or grilling it? Each method has different cooking times.

Here's a general guideline:

* Rare: 125-130°F (52-54°C)

* Medium-rare: 130-135°F (54-57°C)

* Medium: 140-145°F (60-63°C)

* Well-done: 160°F (71°C)

Once you provide me with the details, I can give you a more accurate estimate for how long to cook your 3-pound oven roast beef.