Question

find the length of an arc of circle which subtends an angle of 108° at the centre if radius is 15 cms

Answer 1

Length of the arc =(angle) /360*2*22/7*r
=(108/360)*2*22/7*15=198/7

Answer 2

we know that
angle=arc/radius
angle(in radian)=108×2×π/360=3π/5
3π/5=arc/15
arc=15×3π/5
arc=9π
arc=28.28cm