question_answer

The radius of a circle is\[\text{2}0\text{ cm}\]. It is divided into four parts of equal area by drawing three concentric circles inside it. Then, the radius of the largest of three concentric circles drawn is: (Take \[\pi =3.14\])

A) \[10\sqrt{5}\,cm\]

B) \[10\sqrt{3}\,cm\]

C) \[10\,cm\]

D) \[10\sqrt{2}\,cm\]