Constant Speed Motion
Given the speed of an object (v), and the time (t) it takes to travel a distance d, the relationship between these variables is:
d = v.t
Perry traveled at an average speed of v1=55 miles/hour for t1=3.5 hours. The distance traveled is:
d1 = 55 miles/hour * 3.5 hours = 192.5 miles
After that, Perry traveled at v2=60 miles/hour for t2=2.5 hours. The distance traveled is:
d2 = 60 miles/hour * 2.5 hours = 150 miles
The total distance Perry traveled was:
d = d1 + d2 = 192.5 miles + 150 miles = 342.5 miles
Perry traveled 342.5 mi (last choice)