Carol Needs to Travel to Stoney Point from Her Home

Multiple Choice

Carol needs to travel to Stoney Point from her home in Collinsville. She can travel 39 miles via a rural route at 45 mph, or she can travel a somewhat longer distance at 65 mph if she follows one Interstate due east and then another interstate due north (see figure) . If the eastern portion of the
Interstate route is 21 miles less than the northern portion, find the total distance Carol will travel if She follows the interstate route. [Figure is not necessarily drawn to scale.]

A) 61 miles
B) 17 miles
C) 12 miles
D) 51 miles