When a boy was 6 years old ha hammered a nail into his favourite tree to mark his height. 5 years later if the tree grew A inches every year how much would the nail be?

When the boy was 6 years old, he hammered the nail into the tree at his height. Five years later, the boy is now 11 years old, and the tree has grown A inches each year, resulting in a total growth of 5A inches. However, the nail's position remains fixed, so it will still be at the same height where it was hammered, regardless of the tree's growth. Therefore, the nail will still be at the same height above the ground, unaffected by the tree's growth.