Question

Pls help it is :D and u can explian if u want to

Answer 1

Answer:

6

Step-by-step explanation:

A = pi r^2

C = 2 pi r

A = B (area)

3C = B

sub C = 2 pi r into 3C = B, and A = pi r ^ 2 into B

3 (2 pi r) = pi r ^ 2

6 pi r = pi r^2

( divide both sides by pi )

6r = r^2

r^2 - 6r = 0

r(r-6) = 0

r = 0 or r-6 = 0

radius can not be 0 , therefore r = 6

hope this makes sense, might be little confusing sorry!