The correct choice is (a) 7.54
The explanation: Given, Wing loading for maximum loiter W/S = 32, CD0 = 0.06,
q = 20unit, Oswald efficiency e=0.6.
Wing loading at maximum loiter is,
W/S = q*\(\sqrt{3*ᴨ*AR*e*CD0}\)
32 = 20*\(\sqrt{3*ᴨ*AR*0.6*0.06}\)
1.6= \(\sqrt{3*ᴨ*AR*0.6*0.06}\)
Hence, by squaring the aspect ratio AR,
AR = 7.54