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Question -

From a circular sheet of radius 4 cm, a circle of radius 3 cm is removed. Find the area of the remaining sheet. (Take π = 3.14)



Answer -

Radius of the circular sheet = 4 cm
∴ Area =πr2 = π × 4 × 4 = 16π cm2
Radius of the circle to be removed = 3 cm
∴ Areaof sheet removed = πr2 = 9π cm2
Area of the remaining sheet
= (16π – 9π) cm2 = 7π cm2
= 7 × 3.14 cm2 = 21.98 cm2
Hence, the required area = 21.98 cm2.

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