Answer
The ratio $P_B/P_A$ is 0.704
Work Step by Step
$P_A = V/R_A$ and $P_B = V/R_B$
Note that $R_B = 1.42~R_A$
We can find the ratio of $P_B/P_A$.
$P_B/P_A = \frac{V/R_B}{V/R_A} = R_A/R_B = R_A/(1.42~R_A) = 1/1.42 = 0.70$
The ratio $P_B/P_A$ is 0.704.
