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an aircraft has a mass 4*10^5 kg with total wing area 500 m^2 flying at a speed 720km/hr . the density of air at its height is 1.2 kg/m^3. estimate the fractional increase in air speed on the upper surface of its wing relative to lower surface. (a) 0.04 (b) 0.08 (C) 0.17 (d) 0.32
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