Question

From a circular metal of radius 9cm.a circle of radius 4cm is removed. Find the area of the remaining sheet.​

Answer 1

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Area of remaining sheet = Area of circle having radius 9cm - Are of circle having radius 4cm

Area of circle 1 = 3.14 × 81 = 254.34 cm²

Area of circle 2 = 3.14 × 16 = 50.25 cm²

Therefore, required area of remaining sheet =

• 254.34 - 50.25 = 204.10 cm²