Circle A has a radius of 9 centimeters and Circle B has a diameter of 19 centimeters. What is the relationship between the circumferences of Circle A and Circle B?

18:19

Step-by-step explanation:

Given that,

The radius of circle A = 9 cm

The diameter of circle B = 19 cm

We know that,

Radius = diameter/2

The radius of circle B = 19/2 cm

The circumference of circle A is :

....(1)

And that of circle B is :

....(2)

Dividing equation (1) and (2) :

Hence, the ratio of circumferences of Circle A and Circle B is 18:19.

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this implies that all possible options, except 24, can be accepted

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