The number of miles to walk in two hours 6 miles why? easy Becuase if you know there is 60 minutes in a hour so multiply 60 times 2 becuase the 2 means the hours and the 60 how many minutes in a hour okay you know that. Now divide 120 by 20 which equals 6 there you get answer! the 20 means the minute per mile and the 120 the 2 hours hope I help good luck!