Question 1002270
Conversion ratio,  60 seconds is 1 minute, also 60 minutes is 1 hour.


{{{(1/57.1)(mile/second)(3600/1)(seconds/hour)}}}


{{{(1/57.1)(mile/cross(second))(3600/1)(cross(seconds)/hour)}}}


{{{(3600/57.1)(miles/hour)}}}


{{{highlight(63(miles/hour))}}}