You can put this solution on YOUR website! Convert from one units set into another.
Either convert mph to ft/s or ft/s to mph.
To convert from X mph,
X mi/hr*(5280 ft/mi)*(1 hr/3600 sec)=Y ft/sec
or
X ft/s*(1 mi/5280 ft)*(3600 sec/1 hr)=Z mph
Work it through and find out.