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We know that : the area of the sectorthe area of the circle=Aπr2=θ2π (see the picture)
dAdt=12r2dθdt (r is constant)
The minute hand takes 60 minutes for one revolution. Then the angular velocity of one revolution per minute is
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Five circles are placed in a rectangle as shown. If the length of the shorter side of the rectangle is 1, find the length of the other side.
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