Answer
31 mi/hr
Work Step by Step
$\frac{14\ m}{s}\times\frac{1\ km}{1\times10^3\ m}\times\frac{1\ mi}{1.6093\ km}\times\frac{60\ s}{1\ min}\times\frac{60\ min}{1\ hr}=31.318\ mi/hr=31\ mi/hr$
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