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Julian walked from his house for 2 hours at a speed of 4 miles per hour to the library. he then returned home by bicycle at a speed of 12 miles per hour. find his average speed for the whole entire journey
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Julian walked from his house for 2 hours at a speed of 4 miles per hour to the library. he then returned home by bicycle at a speed of 12 miles per hour. find his average speed for the whole entire journey in miles per hour

User Hessam
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His average speed is 8 miles per hour.
User SandroRiz
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