Two Cylinders Are Made Out of the Same Material and Are

Two cylinders are made out of the same material and are of equal length as shown.The cylinders are connected to a battery with voltage Vb as shown.If the voltage drop across resistor R2 is 0.810 * Vb,what is the ratio of the radii r1/r2 of the two cylinders?

A) 1.10
B) 1.29
C) 1.51
D) 1.76
E) 2.06