Question

The radius of one circle is 3 times that of another circle. Find the ratio of their areas​

Answer 1

Answer:

1:9

Step-by-step explanation:

Let radius of first circle=r cm

Area =2πr^2

Let radius of another circle=3r cm

Area = 2πr^2 = 2π(3r)^2 = 2π9r^2 = 18πr^2

Ratio = 1:9

Answer 2

Answer:

THE ANSWER IS 1:9

Step-by-step explanation:

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