Question

from a 4cm circular 3cm sheet is cut find its radius​

Answer 1

hey XD..... here is ur answer

Area of the circle with radius 4 cm = πr² = π(4)² = 16 π cm²

Area of the circle with radius 3 cm which is removed = π(3)² = 9π cm²

Remaining area = 16π - 9π = 7π = 7 x 3.14 = 21.98 cm²

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Answer 2

Answer:

Hello mate...

$area \: of \: circle \: with \: radius \: 4cm = \pi {r}^{2} \\ = \pi {4}^{2} = 16\pi {cm}^{2} \\ area \: of \: circle \: with \: radius \: 3cm = 9\pi {cm}^{2} \\ remaining \: area = 16\pi - 9\pi = 7\pi = 21.98 {cm}^{2}$

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