400
Theresa and Hope arrange a round-trip walk from the 3 1/2 mile mark to the 10 1/4 mile mark along a trail. They will walk at an average speed of 2 1/2 miles per hour, beginning at 9:15 AM. How long, in hours and minutes, will it take Theresa and Hope to complete the trip?
What is 5 2/5 hours or 5 hours and 24 minutes