SOLUTION: the elevator in the washington monument takes 75 seconds to travel 500 feet to the top floor. what is the speed of the elevator in miles per hour? give your answer to two significa

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Question 487177: the elevator in the washington monument takes 75 seconds to travel 500 feet to the top floor. what is the speed of the elevator in miles per hour? give your answer to two significant digits.
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
75 seconds to travel 500 feet
We use 1 mi = 5280 ft, 1 min = 60 s, 1 h = 60 min  
to make unit fraction multipliers:



Cancel the ft



Cancel the seconds:



Cancel the minutes:




All that's left is


expr%28%28500%2A1%2A60%2A60%29%2F%2875%2A5280%2A1%2A1%29%29expr%28mi%2Fh%29

expr%281800000%2F396000%29expr%28mi%2Fh%29

expr%2850%2F11%29expr%28mi%2Fh%29

4.545454545expr%28mi%2Fh%29

Rounded to two significant digits:

4.5expr%28mi%2Fh%29

Edwin