Question

Need some help with question 20

Answer 1

Answer:

l = 420 cm

Step-by-step explanation:

20.

Central angle  = 60°

The radius of circle, r = 7 cm

We need to find the length of the arc. We can find it as follows :

$l=r\times \theta\\\\l=7\times 60\\\\l=420\ cm$

So, the length of the arc is equal to 420 cm.