human
Theon's ship can move 15 nautical miles per hour while Yara's ship can move 30 nautical miles per hour. If their destination is 90 nautical miles away, how many hours ahead will Yara be ahead of Theon?
assistant
How many hours will it take Theon to arrive at the destination? ** Theon's estimated time of arrival is 90/15 = <<90/15=6>>6 hours.
How many hours will it take Yara to arrive at the destination? ** Yara's estimated time of arrival is 90/30 = <<90/30=3>>3 hours.
How many hours ahead will Yara be ahead of Theon? ** Therefore, Yara is ahead by 6 - 3 = <<6-3=3>>3 hours.
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