th length of minute hand of a clock is 7cm the area swept by the minute hand in one minute is
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For a minute hand, 60 minutes is equivalent to 360°
and so 30 minutes will be 180°
Area swept in 60 minutes is area of full circle.
So area swept in 30 minutes will be area of half circle.
Thus, area swept = 21 ×( 722 )×7 2
=77cm 2
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