Question

Find the radius of a circle in which a central angle 45 intercepts an arc of length 33cm.

Answer 1

0
l=132cml=132cm

θ=45∘θ=45∘

Radian measure =45×π18045×π180

⇒π4⇒π4 radians

Now,by r=lθr=lθ

We have

r=132×4πr=132×4πcm

⇒132×4×722⇒132×4×722cm

⇒168⇒168cm

Hence (C) is the correct answer