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OpenStudy (anonymous):
You and your little brother are going to race down the escalator. Your escalator is moving at 3 feet per second and your brother's escalator (cover the same distance) is moving 1 foot per second. If you finish 12 seconds ahead of your brother, how long did you ride the escalator? How long is the escalator?
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OpenStudy (anonymous):
the velocity difference is 2 feet/second so 12 seconds times 2 feet/second = 24 feet
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