From a square sheet or eacn side 7cm, a circle of radius 3.5 cm is removed from the centre of the square sheet. Find the area of the remaining sheet. (Take z = 3.14)
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The area of the circular sheet with 4cm radius is,
A=πr
2
=16π
The area of the circular sheet with 3cm radius is,
A=πr
2
=9π
Since the circle with radius 3cm is removed, then the remaining area is,
A=16π−9π
=7π
=7×3.14
=21.98cm
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