Q. 5 B5.0( 1 Vote )

# Find the area of a sector whose radius and perimeter are 20 cm and 110 cm respectively.

Answer :

perimeter of a sector = 110 cm

radius = 20 cm

Perimeter = r + r + length of arc

= 2 ( r) + length of arc

110 =arc length + 2(20)

Arc length (a)= 110 – 40 = 70cm

Area of sector =

⇒ area of sector = 700 cm^{2}

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