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2015-05-18T04:52:35+05:30

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   the minute hand moves 360 deg = 2 π radians in one hour
     so angular velocity = ω = 2 π / 3600    rad/sec

   linear speed = v = r ω
             π * 10⁻⁴  m/sec  =  r * 2 π /3600

   =>  r =  0.18  meters = 18 cm

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