Question

The arc of a circle creates an angle of 60 ° at the center, then find the length of that arc. The radius of the circle is 21 cm.
[π=22/7]

Answer 1

The formula is angle/360 * 2pi r.
                answer is 60/360 * 2 * 22/7* 21
                                 1/6 *2 *22*3
                                  =22cm

Answer 2

${ \huge{\boxed{\tt {\color{red}{answer}}}}}$

Given,

Length of the arc = l = 37.4 cm

Central angle = θ = 60° = 60π/180 radian = π/3 radians

We know that,

r = l/θ

= (37.4) * (π / 3)

= (37.4) / [22 / 7 * 3]

= 35.7 cm

Hence, the radius of the circle is 35.7 cm

Hope it's Helpful....:)