Final answer:
The exact combined total of Beowulf and Hrothgar's rule is not known, but Beowulf is depicted as ruling for several decades while Hrothgar's reign lasted for 50 years.
Step-by-step explanation:
The combined total of the rule of Beowulf and Hrothgar over their respectivse kingdom is not mentioned in the Beowulf poem or any historical records. Beowulf is a fictional character and Hrothgar is believed to be a historical figure from the time when the poem was composed. Therefore, there is no factual information available to determine the exact duration of their rule. However, based on the narrative in the poem, Beowulf is depicted as ruling for several decades, while Hrothgar's reign is said to have lasted for 50 years.
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