Question

Find the length of an arc of a circle whose radius is 21 cm and the angle subtended at the centre is 30°.​

Answer 1

Answer:

radius of the circle (r) = 21 cm 

θ = 30 degree

length of an arc of a sector = θ/360 ⨯ 2πr

  = 30/360 ⨯ 2⨯22/7⨯ 21

= 11 cm

Answer 2

Answer:

11cm

Explanation:

radius of circle (r) =2 cm

0=30 degree

length of an arc of a sector=0/360×2πr

=3/360×

2×22/7×21

=11 cm

I hope this answer will help you