When an object with an electric charge of $0\mathrm{.}050mC$ is $5\mathrm{.}0m$ from an object with an electric charge of $0\mathrm{.}030mC,$ the force between them has a strength of $0\mathrm{.}5393N$

Calculate the strength of the force between the two objects if they are $20.m$ apart

$?$

Round your answer to $2$ significant digits