John lives in a city and works in a nearby town. He drives to work every day at an average speed of 50 kilometers per hour and it takes him 1.5 hours to reach his workplace. On weekends, he visits his friend who lives twice as far as his workplace from his home. How long does it take John to reach his friend’s house if he drives at the same average speed? Let's think step by step and output the final answer within \boxed{}.
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