Problem: Every day, Zoe’s mother, Wilma, picks her up at the train station when she comes home from school, and then Wilma drives Zoe home. They always return home at 5:00 pm. One day, Zoe left school early and got to the train station an hour early. She then started walking home. Wilma left home at the usual time to pick Zoe up and they met along the route between the train station and their house. Wilma picked Zoe up and then drove home, arriving at 4:48 pm.
For how many minutes had Zoe been walking before Wilma picked her up?
From Wearing Gauss’s Jersey, Dean Hathout, CRC Press, 2013.
