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ruth was hauling a wide load out of portland. at 7:00 am she headed north from exit 102 at an average speed of 35 pmh. michael headed north from the same exit at 9:00 am in his pontiac. by 3:00 pm the same day michael was 20 miles ahead of ruth. what was michael's average speed
ruth was out of portland at 35mph at 7:00am so at 9 am, she was 70 mile ahead of michael but michael was 20 miles ahead by 3 pm. so in 6 hours, he went past ruth by 90 miles which is 90/6 = 15mph michael speed = ruth speed + 15 = 35 + 15 = 50mph
