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QUESTION
Ingrid left Mary's house and drove toward her friend's house. Three hours later Paul left Mary's house driving 30 mph faster in an effort to catch up...
Ingrid left Mary's house and drove toward
her friend's house. Three hours later
Paul left Mary's house driving 30 mph faster in an
effort to catch up to her. After two hours
Paul finally caught up. Find Ingrid's
average speed.
