A farmer needs to drive from his farm into town to pick up supplies. He usually drives 29 miles on a straight stretch of highway, but because of road construction, he must take a detour. The detour consists of driving 21 miles, turning at a right angle at an intersection, and then driving some more as shown. How many miles does the detour add to the farmer’s commute into town? A) 8 miles B) 10.5 miles C) 12 miles D) 15.7 miles
