Question 1196750
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The distance formula is  

    x*t = D  (average speed times time equals distance).


For given problem it takes form

    7x = 415  feet.


From this formula, the average rate is  

    x = {{{415/7}}} = 59.286  ft/s.
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Solved.


The meaning of the question in the post is quite dark, but I did my best.