There is a hill behind a person-™s house. He walks up the top ofthe hill at a speed of 3/2 km/ hour - but walks down it at 4km/hour. If it takes him 6hours for the entire journey - the distance - in km - from his house to the top of the hill is

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There is a hill behind a person-™s house. He walks up the top ofthe hill at a speed of 3/2 km/ hour - but walks down it at 4km/hour. If it takes him 6hours for the entire journey - the distance - in km - from his house to the top of the hill is