how long does it take to cook a rump roast in a crock pot
Place the lid on the Crock-Pot and cook on low for eight to 10 hours. After about four hours you may add sliced potatoes, carrots, celery or cooked beans if you so desire.Barbara Smith/Demand Media. Carve the roast across the grain, and serve with the vegetables (if any) that were cooked alongside it.lace the lid on the Crock-Pot and cook on low for eight to 10 hours. After about four hours you may add sliced potatoes, carrots, celery or cooked beans if you so desire.