Hydrogen, oxygen and carbon make up about 99% of the average human. I'm going to cheat a little and leave out the other 1%, which is made up of trace elements (that is, stuff there's only a trace of in the body). Then, let's assume an average adult weighs 70 kilograms.
1 Bake the potatoes: You can bake the potatoes directly on the oven rack, or you can place them a few inches apart on a foil-lined baking sheet. 2  Bake the potatoes for 50 to 60 minutes.3  Flip them over every 20 minutes or so and check them for doneness by piercing them with a fork. This allows steam to escape from the baking potato. 2  Bake the potatoes: You can bake the potatoes directly on the oven rack, or you can place them a few inches apart on a foil-lined baking sheet. 3  Bake the potatoes for 50 to 60 minutes.
Perfect Baked Potato - Directions. 1  Preheat the oven to 300 degrees F (150 degrees C). Scrub the potato, and pierce the skin several times with a knife or fork. 2  Place the potato in the preheated oven, and bake for 90 minutes, or until slightly soft and golden brown. Slice the potato down the center, and serve with butter and black pepper. Sprinkle shredded Cheddar cheese over the top, if desired.