An E.m wave with poynting vector $6\;walt/m^2$ absorbed by a surface of area $12\;m^2$ Find the force on the surface .

Question

$\begin{array}{1 1} 24 \times 10^{-8}\;N \\24 \times 10^{-4}\;N \\ 24 \times 10^{-2}\;N \\ 24 \times 10^{8}\;N \end{array} $