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in Mathematics by (65 points)
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From a circular sheet of radius 4cm, a circle of radius 3cm is removed. The area of the remaining sheet is

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1 Answer

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The area of the circular sheet with 4cm radius is, 

A=πr2 

=16π

The area of the circular sheet with 3cm radius is, A=πr2 

=9π 

Since the circle with radius 3cm is removed, then the remaining area is, 

A=16π−9π 

=7π 

=7×3.14 

=21.98cm2

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