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?
Answer
In 15 minutes.
Start with steak 1 and steak 2. After five minutes you take steak 1 off, start to fry steak 3 and turn over steak 2.
After 10 minutes steak 2 is ready and steak 1 and steak 3 need to be finished on the second side. Remove steak 2, and fry the other side of steak 1 and steak 3.