Question

This maybe primary but i don't get it

There's a circle with the radius = 3, calculate it's perimeter

Answer 1

p=18.84

Explanation:

You just need to double its radius and multipe with pi

Answer 2

P=r x 2 x pi
= 3 x 2 x 3.14
= 6 x 3.14 = 18.84