Question

1he radius of circle is 2 metre .what is the radius of another circle whose area is 9 times the first circle.please tell me ​

Answer 1

Answer:

6

Step-by-step explanation:

(pi)r^2 = (pi)(2)^2 = 4pi (first circle)

second circle area = 9× (4pi) = 36pi

36pi = pi(r2)^2

so (r2)^2 = 36

r2 = 6