# An airplane has a weight of 4000 lb, wing area of 180 ft2 , aspect ratio of 8, and Oswald efficiency factor of 0.85. The airplane

###### Question:

An airplane has a weight of 4000 lb, wing area of 180 ft2 , aspect ratio of 8, and Oswald efficiency factor of 0.85. The airplane is flying at standard sea level with a velocity of 180 mi/h, which corresponds to minimum thrust required for this airplane. Determine the total drag on the airplane.

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