Answer fast plzz...
Kindly refer to the following link:
https://www.meritnation.com/ask-answer/question/radius-of-an-iron-sphere-is-0-21-cm-if-density-of-iron-is-7/gravitation/7196673
https://www.meritnation.com/ask-answer/question/radius-of-an-iron-sphere-is-0-21-cm-if-density-of-iron-is-7/gravitation/7196673