Question 97775
distance covered by the faster runner in 3 hours 
= speed * time
=9.2 miles/hr * 3hr
=27.6 miles

slower runner is 4.8 miles behind

therefore distance of the slower runner from the start after 3 hours
=27.6 miles - 4.8 miles
=22.8 miles

Speed of the slower runner = distance / time
                           = 22.8/3
                           =7.6 miles/hr