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My aircraft is flying at particular altitude. At that altitude ratio of actual airspeed to the equivalent airspeed is 1.4 then, what should be the desire value of density ratio?

My aircraft is flying at particular altitude. At that altitude ratio of actual airspeed to the equivalent airspeed is 1.4 then, what should be the desire value of density ratio? Correct Answer 0.51

Density ratio = (1/ratio of actual airspeed and Equivalent airspeed)2 = (1/1.4)2 = 0.51.

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