An aeroplane of mass 5000kg is flying at an altitude of 3km. If the area of the wings is $50{\mathrm{m}}^2$ and pressure at the lower surface of wings is $0.6 \times {10}^5 \mathrm{Pa}$, then the pressure on the upper surface of wings is (in pascal) (g=10${\mathrm{ms}}^{-2}$)