Post by ccs06 on Nov 12, 2008 at 7:47am. Any advice for cleaning ceramic tile with textured grooves in it? The tile also has little pit holes in it to that the dirt just gets in and sticks as well as along the grove lines. This is in a high traffic area so it is dirty nightly. I started cleaning with a scrub brush and then moved to a handled angled brush to get in the crevices better, but it takes forever and it never looks absolutely clean.
In an oven heated to 275 degrees you cook a roast for 28 minutes per pound. Therefore the estimated cooking time for a 4.8 pound roast is 134 minutes or 2.23 hours.
3. Place the roast on a rack in a 2 deep pan. Cook for 15 nminutes at 500 degrees, then turn the temperature down to 275 without opening the door. 4. Cook the roast until an instant read meat thermometer inserted into the center of the roast registers 115 - 120 degrees, for rare. This will take 2 1/2 - 3 hours at the 275 cooking temperature. Total time depends upon the thickness of the meat, and the exact temperature of your oven. When the roast is done, place it on a platter, cover it with aluminum foil, and let it rest at least 20 minutes.