Calvin's Driving TripAlgebra Level 1
Calvin was making a trip to the University of Chicago. When he drove down, he took Lakeshore Drive, and averaged 35 miles per hour. On his way back, he took the I-94 highway, and averaged 50 miles per hour. Given that the return journey was 4 miles longer and took 6 minutes less, what is the length of the Lakeshore Drive route (in miles)?