Question

the ratio of the circumference of two circle is 4:1 . find the ratio of their areas​

Answer 1

Answer:

16:1

Step-by-step explanation:

T I P :

Before solving, it's better to find the certain type of the question first.

Let circumference of circle 1 be $2\pi r_1$, circle 2 be $2\pi r_2$.

Then the radius is $r_1$, $r_2$ respectively.

Area of circle 1 is $\pi r_1^2$ and 2 is $\pi r_2^2$.

∴Ratio of their areas is $r_1^2:r_2^2$, which is a ratio of square of radius.

∴The answer is $4^2:1=16:1$.

Answer 2

Answer:

16:1

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