From a circular sheet of radius 4 cm, a circle of radius 3 cm is removed. Find the area of the remaining sheet.
It is given in the question that,
Outer radius of circular sheet = 4 cm
Inner radius of circular sheet = 3 cm
In the question, we have to find out the remaining area of sheet
∴ Remaining area of sheet = Outer area – Inner area
We know that,
Area of the circle = πr2
∴ Remaining area of sheet = 3.14 × 4 × 4 – 3.14 × 3 × 3
= 3.14 × 16 – 3.14 × 9
= 50.24 – 28.26
= 21.98 cm2
Hence,
Remaining area of the sheet = 21.98 cm2
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