Q. 205.0( 4 Votes )

In a circle of ra

Answer :

Given-

Radius of Circle(r) = 21 cm


Angle sustended at the centre by the arc(θ) = 60°


(i) Length of arc = (θ/360°) × 2× π × r


= (60°/360°) × 2× (22/7)× 21


= (1/6) × 132


= 22 cm


(ii) Area of the sector formed by the arc = (θ/360°) × π × (r)2


= (60°/360°) × (22/7) × (21)2


= (1/6) × 22× 63


= 231 cm2


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