Question

the ratio of the circumference of 2 circle is 2:5. the ratio of their radii is...
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Answer 1

4:9

Let the radii of two circles be r

1

and r

2

.

Then, according to question, we have

2πr

2

2πr

1

=

3

2

⇒

r

2

r

1

=

3

2

Squaring both the sides, we get,

r

2

2

r

1

2

=

9

4

⇒

πr

2

2

πr

1

2

=

9

4

So, the ratio of the areas of two circles is 4:9

Answer 2

Step-by-step explanation:

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