The ratio of radius of a circle and the side of a square is 2 : 13. Find the ratio of their areas:  Choose the correct choice from the following choices.
A) 2 : 1 B) 4 : 7 C) 8 : 77 D) 4 : 169 E) None
radius/side = 2/13   â‡’ area of circle/area of square= 4/169   Answer: 4 : 169
<result>D</result>
The ratio of radius of a circle and the side of a square is 2 : 13. Find the ratio of their areas: