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Ambulance driver takes 2 2 hours to travel from patient's residence to ER at the rate of 6 0 6 0 miles per hour. It

Ambulance driver takes 2 hours to travel from patient's residence to ER at the rate of 60 miles per hour. It takes 3 hours to travel from ER to nearby hospital with a 20% decreased speed. Find the average speed through the whole journey.

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