10. 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

Answer-a