How long cooking time 2.6kg rib beef?

To calculate the cooking time for a 2.6kg rib beef, you'll need to consider a few factors:

- The type of cut: Rib beef is a relatively tender cut, but it still has some connective tissue that needs to be broken down during cooking.

- The desired doneness: Are you aiming for rare, medium-rare, medium, or well-done?

- The cooking method: Are you cooking the rib beef in the oven, on the grill, or in a slow cooker?

As a general guide, here are the estimated cooking times for a 2.6kg rib beef at 350°F (175°C) in the oven:

- Rare: 20-25 minutes per pound (45-55 minutes total)

- Medium-rare: 25-30 minutes per pound (65-75 minutes total)

- Medium: 30-35 minutes per pound (80-90 minutes total)

- Well-done: 35-40 minutes per pound (95-105 minutes total)

Please note that these times are approximate and can vary depending on the specific cut of rib beef and your oven's temperature. I recommend using a meat thermometer to ensure the beef reaches your desired doneness.