Difference between minute and hour hands.
An hour hand moves 1/2 degree in each min, and min hand moves 6 degree in each min. So there will be a net increase of 5.5 degrees between the hands in 1 min.
According to the question, there must be a net increase of 6 degrees between the hands.
This would happen after 12/11 minutes.
Answer: 12/11 minutes, that is about 1.09 min or 65.45 seconds.
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