The ratio of the circumferences of two circles is 2: 3. if the large circle has a radius of 39 cm, what is the radiusof the small circle?

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Step-by-step explanation:

Given : the ratio of the circumferences of two circles is 2:3. If the large circle has a radius of 39 cm,

To find : what is the radius of the small circle.

Solution : We have given that ratio of the circumferences of two circles is 2:3.

Let  is radius of larger circle and    is radius of small circle .

Then circumference = = .

Solving the above equation

=   .

We have given radius of larger circle = 39 then

=   .

On multiplying both sides by 39.

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Therefore, .