Light with an energy flux of $20w/cm^2$ falls on a non- reflectiy surface has an area of $30\;cm^2$ , the total momentum delivered (for complete absorption ) during 30 minutes is

Question

$\begin{array}{1 1} 36 \times 10^{-5}kg m/s \\ 36 \times 10^{-4}kg m/s \\ 108 \times 10^{4}kg m/s \\ 1.08 \times 10^{7} kg m/s \end{array} $