Length of minute hand of a well clock is 7cm the area swept by it is 30 minutes is
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In 30 minutes the hand complete s a half circle
the radius is length of the minute hand
area of semi circle is πr^2/2
=3.14(7)^2/2
=76.93cm^2
the radius is length of the minute hand
area of semi circle is πr^2/2
=3.14(7)^2/2
=76.93cm^2
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