From a circular sheet of radius 5 cm, a circle of radius 4 cm is removed. Find the area of the remaining sheet is ______ sq. cm. (Take π = 3.14)
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Answer:
Radius of the circular sheet = 4 cm
∴ Area = πr square = π × 4 × 4 = 16π cm square
Radius of the circle to be removed = 3 cm
∴ Area of sheet removed = πr square = 9π cm square
Area of the remaining sheet
= (16π – 9π) cm square = 7π cm square
= 7 × 3.14 cm square = 21.98 cm square
Hence, the required area = 21.98 cm square
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