Two boxes which weigh 10 pounds and 5 pounds are placed in an airplane so that their distance aft from the CG are 4 feet and 2 feet respectively. How far forward of the CG should a third box, weighing 20 pounds, be placed so that the CG will not be changed?

发布于 2021-02-17 01:46:09
【单选题】
A 3 feet.
B 2.5 feet.
C 8 feet.

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