A horizontal escalator connecting airport terminals is (1 mathrm{~km}) long. Two kids start from opposite ends and

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A horizontal escalator connecting airport terminals is \(1 \mathrm{~km}\) long. Two kids start from opposite ends and run toward each other at \(3 \mathrm{~m} / \mathrm{s}\) and meet \(600 \mathrm{~m}\) from the start of the escalator. What is the speed of the escalator? How long do they take to reach each other?

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