Biology, asked by RohitAhlawat1, 1 year ago

from a circular sheet of radius 4 centimetre a circle of radius 3 cm is removed find the area of remaining sheet take Pi 3.14

Answers

Answered by shrimalidewanshi
8
area of circle 1 - area of circle 2
pie r square - pie r square
3.14 × 4 × 4 - 3.14 3 × 3
16 - 9
7cm square
Answered by Anonymous
1

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Area of outer circle =\pi  {r}^{2}  \\   =  \frac{22}{7}   \times 14 \times 14 \\  = 22 \times 28 = 616 cm²</p><p>⠀⠀⠀⠀</p><p>\\  \\ area \: of \: inner \: circle \:  = 2 \times  \pi  {r}^{2}  \\  \:  =  \: 2 \times  \frac{22}{7}  \times 35 \times 35 \\  = 22 \times 3.5 \\  = 77 {cm}^{2}  \\  \\ </p><p>area \: of \: rectangle =  \: l \times b \\ area</p><p> \: of \: whole \: circle \:  -</p><p>  \: ( \: area </p><p>\: of \: the</p><p> \: both \: circles \:  </p><p>+  </p><p>\: area \: of</p><p> \: rectangle</p><p> \: ) \:  =  \: area </p><p>\:  of</p><p> \: remaing \: sheet. \\  = 616 \:  -  \: ( \: 77 + 3) \\</p><p>  = 616 - 80 = </p><p> {536cm}^{2} ....

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