Question

A child is running on a moving sidewalk in an airport. When she runs against the sidewalk's motion, she travels 27ft in 9 seconds. When she runs with the sidewalk's motion, she travels 99ft in the same amount of time. What is the rate of the child on a still sidewalk and what is the rate of the moving sidewalk?

Answer 1

3ft per second on a still sidewalk (27/9) , 11ft on the moving sidewalk.(99/9)

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