The answer is: 5 miles per hour
First we need to find out how many 3 minutes is in an hour. To do this, we need to divide 60 by 3= 20. Since we now that there are 20 (three minutes) in an hour (60 minuets), me can now multiply 20 by 1/4 of a mile= 5. That makes the answer 5 mph
Hope this helps and hope you have a great day