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Angle moved by the hand in moving from midnight to 8 am = 
             = 2 π * 8 /12 = 4π/3 radians 

The length of the circular curve that the top of the hand will move =
              = 12 feet * 4 π /3 radians = 16 π  feet

how could the radius be 8/12,can u please give an explanation