Air is streaming past a horizontal air plane wing such that its speed in 120 m/s over the upper surface and 90 m/s at the lower surface. If the density of air is 1.3 kg per metre3 and the wing is 10 m long and has an average width of 2 m, then the difference of the pressure on the two sides of the wing of

• A.            4095.0 Pascal                       
• B.            409.50 Pascal                       
• C.            40.950 Pascal                       
• D.             4.0950 Pascal