Question

In a circle the length of the arc of Central angle 40 degree is 3π cm, what is the perimeter of the circle? What is its radius?

Answer 1

Formula:-

thetha×2(pi)(r)/360

3(pi) = 2(pi)(r)/9

27=2r

r=27/2m

perimeter=2(pi)r

$27\pi$

Answer 2

Answer:

Radius = 27/2

Perimeter = 27π