Answer: 3.333 + miles per hour
Explanation:
Distance walked = 5+ miles
Time taken to cover distance = (8:15 am - 6:45am) = 1 hour 30 minutes = 1.5 hours
Average walking rate = (total distance walked / total time taken)
Average walking rate = (5 + miles / 1.5 hours)
Average walking rate = 3.333 + miles per hour