The ratio of the radius of two circles is 2: 3, and then the ratio of their areas is?  Choose one:
A) 1: 8  B) 4:9  C) 1: 9  D) 1: 3  E) 1: 2
r1: r2 = 2: 3   Πr12: Πr22   r12: r22 = 4: 9   Answer:4:9
<result>B</result>
The ratio of the radius of two circles is 2: 3, and then the ratio of their areas is?