Air of density 1.2 kg m^-3 is blowing across the horizontal wings of an aeroplane in such a way that its speeds above and below the wings are 150…

Air of density $\displaystyle 1.2 \mathrm{~kg} \mathrm{~m}^{-3}$ is blowing across the horizontal wings of an aeroplane in such a way that its speeds above and below the wings are $\displaystyle 150 \mathrm{~ms}^{-1}$ and $\displaystyle 100$ $\displaystyle \mathrm{ms}^{-1}$, respectively. The pressure difference between the upper and lower sides of the wings, is :