Momentum & Radiation Pressure question from JEE Main 2021 (26 Aug, Shift 1)

The electric field in a plane electromagnetic wave is given by

$\vec{E} = 200 \cos\left[\left(\frac{0.5 \times 10^{3}}{m}\right) x - \left(1.5 \times 10^{11} \frac{rad}{s} \times t\right)\right] \frac{V}{m} \hat{j}$. If this wave falls normally on a perfectly reflecting surface having an area of 100 cm2. If the radiation pressure exerted by the E.M. wave on the surface during a 10 minute exposure is $\frac{x}{10^{9}} \frac{N}{m^2}$. Find the value of x.