How long does it take to cook a 9 Lb topside of beef?

The cooking time for a 9 lb topside of beef will vary depending on the method you use. Here are the general cooking times for different methods:

Oven roasting:

* Medium-rare: 20-25 minutes per pound, or until internal temperature reaches 135°F (57°C)

* Medium: 25-30 minutes per pound, or until internal temperature reaches 145°F (63°C)

* Well-done: 30-35 minutes per pound, or until internal temperature reaches 160°F (71°C)

Slow cooker:

* Low setting: 8-10 hours

* High setting: 4-6 hours

Grilled:

* Medium-rare: 10-12 minutes per side, or until internal temperature reaches 135°F (57°C)

* Medium: 12-15 minutes per side, or until internal temperature reaches 145°F (63°C)

* Well-done: 15-20 minutes per side, or until internal temperature reaches 160°F (71°C)

It is important to note that these are approximate cooking times and may vary depending on the specific cut of meat, the size and shape of the roast, and the accuracy of your oven or cooking appliance. It's always a good idea to use a meat thermometer to ensure the roast is cooked to your desired doneness.