Question

From a circular sheet of radius 4 cm, a circle of radius 3 cm is removed. Find the area of the remaining sheet.​

Answer 1

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The area of the circular sheet with 4cm radius is, A=πr2.

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

Since the circle with radius 3cm is removed, then the remaining area is, A=16π−9π

kindly refer to the attachments

Answer 2

Radius of circular sheet (R) = 4 cm

A circle of radius to be removed (r) = 3 cm

The area of remaining sheet = πR² - πr²

= π (R² - r²)

= 3.14 (4² - 3²)

= 3.14 (16 - 9)

= 3.14 × 7

= 21.98 cm²

The area of the remaining sheet is 21.98 cm²

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