How long do you cook 3 kg rolled beef in slow cooker?

For a 3 kg rolled beef in a slow cooker, cook it on low for about 8 to 10 hours or on high for 4 to 6 hours. The exact time may vary based on your specific slow cooker and the desired tenderness. It's best to check the internal temperature, aiming for at least 90°C (195°F) for optimal tenderness. Always allow the meat to rest for a few minutes before slicing.