What is the circumference of the circle? I. The diameter of the circle is 21 cm. II. The area of the circle is 346. $ 5,cm^{2}. $
A) If the data in statement I alone are sufficient to answer the question, while the data in statement II alone are not sufficient to answer the question
B) If the data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question
C) If the data either in statement I alone or in statement II alone are sufficient to answer the question
D) If the data given in both the statement I and II together are not sufficient to answer the question
E) If the data in both the statements I and II together are necessary to answer the question
Correct Answer: C
$ \Rightarrow $ $ r^{2}=\frac{346.5}{22}\times 7 $
$ \Rightarrow , $ $ r^{2}=110.25 $
$ \Rightarrow $ $ r=10.5,cm $
$ \therefore $ Circumference $ =2\pi r=2\pi ,(10.5)=21,\pi ,cm $ Hence, data either in statement I alone or in statement I alone are sufficient to answer the question.
BETA
