JEE Main 17 March 2021 Shift 1 Solved Paper

If 2.5×10−6N average force is exerted by a light wave on a non-reflecting surface of 30cm2 area during 40 min of time span, the energy flux of light just before it falls on the surface is ......W \/ cm2.
(Round off to the nearest integer. Assume complete absorption and normal incidence conditions are there.)