Условие:
Every morning, while it’s still cool, the hedgehog Eric and the little snake Zoya walk through their square meadows and make a «circle». The meadow have identical squares. Hedgehog Eric comes out every day at 7 o'clock in the morning and slowly walks along the path. Little snake Zoe comes out when she wants to, and quickly slides. The speed of animals does not change from walk to walk. Over the years, Eric and little snake Zoya have noticed that they meet in section AB when Zoya starts her walk between 7:05 and 7:40. How much faster is Zoe than Eric? How long does Eric walk?

