Queen Georgia was very attached to the clock that was gifted to her by her late father, King Eli. It was a precious heirloom that had been passed down from generation to generation. She never allowed anyone to touch that clock and even wound it herself. In fact, no other device for measuring time was permitted in her castle. One day she forgot to wind her clock before going to sleep. When she awoke, the clock had stopped. There was no way to reset it to the correct time. Then she remembered that an aunt of hers, who had a clock, stayed in a mansion several miles away.
The clock couldn`t be moved as it was attached to the wall. So, Queen Georgia thought about it and then sent her messenger to her aunt`s house with some instructions. The messenger ran to the aunt's house at a constant speed, rested there for some time and then came running back at the same speed. When the messenger came back, Queen Georgia reset her clock to the exact time. How did she do it?