Beowulf did become king of the Geats and ruled for 50 years. This statement is true.
Explanation:
1. Beowulf, the epic hero of the poem "Beowulf," did become the king of the Geats after the death of his uncle Hygelac.
2. He ruled the Geats for 50 years, bringing peace and prosperity to his people.
3. This information is a crucial part of Beowulf's story and his legacy as a heroic figure in the Anglo-Saxon literature.