School-Safe Puzzle Games

Poll and email question

Please help us improve the site by answering this question:
[poll=5]
Received this in the mail not too long ago: Every day a man arrives at Central Station and a car is waiting to give him a ride to his office. One day, however, the man arrives 1 hour early, so he starts walking toward the office. At some point on his way, the car picks him up, and he arrives 20 minutes early to the office.

How much time did the man spend walking?

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