im not 100% sure but are you reffering to the riddle?
It takes 10 minutes to fry one steak - 5 minutes from each side. Two steaks can fit on a pan. What is the shortest possible time to fry 3 steaks?
In 15 minutes. After five minutes you take one steak off and turn the other. After 10 minutes one steak is ready and the other two need to be finished from second side.
