Two buses leave Dallas at the same time and travel in opposi

Two buses leave Dallas at the same time and travel in opposite directions. One bus averages 58 mph, and the other bus averages 52 mph. When will they be 363 miles apart?
Don\'t you need the time they left to figure out the answer?

Their speeds are added when going in opposite directions
58 + 52 = 110 mph relative speeds
363/110 = 3.3 hours or 3 hrs 18 minutes
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