A commuter is in the habit of arriving at his suburban station each evening exactly at five o'clock. His wife always meets the train and drives him home. One day he takes an earlier train, arriving at the station at four. The weather is pleasant, so instead of telephoning home he starts walking along the route always taken by his wife. They meet somewhere along the way. He gets in the car and drives home. He arrives home, ten minutes ahead of schedule. If his wife and train trip always go at the same speed. How long did the man walk this day?

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## BMAD

A commuter is in the habit of arriving at his suburban station each evening exactly at five o'clock. His wife always meets the train and drives him home. One day he takes an earlier train, arriving at the station at four. The weather is pleasant, so instead of telephoning home he starts walking along the route always taken by his wife. They meet somewhere along the way. He gets in the car and drives home. He arrives home, ten minutes ahead of schedule. If his wife and train trip always go at the same speed. How long did the man walk this day?

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