Air of density \[1.2kg{{m}^{-3}}\] is blowing across the horizontal wings of an aero plane in such a way that its speeds above and below the wings are \[150m{{s}^{-1}}\] and\[100m{{s}^{-1}}\], respectively. The pressure difference between the upper and lower sides of the wings, is

• A. \[60N{{m}^{-2}}\]
• B. \[180\,N{{m}^{-2}}\]
• C. \[7500N{{m}^{-2}}\]
• D. \[12500N{{m}^{-2}}\]