A husband drives his wife to the railway station every morning and in the evening exactly at 6:00pm he picks her up & takes her home.One day she was let off at work an hour earlier and arrived at the railway station at 5:00pm instead of 6:00pm.She started walking home. However ,she met her husband enroute the station and got into the car. They drove home arriving 10mins earlier than usual.How long did the wife had to walk , before she was picked up by her husband?

• They saved a total of 10 minutes, which is because of the saving in the To and Fro journey.
  So, they saved 5 minutes in To journey and 5 minutes in the Fro journey
  
  So, they met 5 minutes before the regular time, so they met at 5.55 instead of 6.
  So, the total time for which she walked is 55 minutes
  
  Answer is 55 minutes
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