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Perimeter of sector is 31cm and …

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Perimeter of sector is 31cm and radius is 6.5 .Find ar.of sector.

 

  • 1 answers

Rupender Singh 8 years, 7 months ago

Radius = 6.5 cm

Perimeter of circle = 31 cm

2r + l = 31

2 × 6.5 + l = 31

13 + l = 31

l = 31 - 13

l = 18 cm

Areas of sector = \(\)\(1/2\) × l × r

                       = 1/2 × 18 × 6.5

                       = 9 × 6.5

                       = 58.5 sq. cm

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