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2014-10-29T10:02:22+05:30

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In 60 minutes, the minutes hand covers 360 degrees. or angle of 2 π or the full circle.

In one minute it sweeps an angle of 2π / 60 or  1/60th of the area of full circle.

Area of the sector it sweeps in one minute = π r² / 60 = π * 12² / 60 = 7.54 cm²
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