Abiplane flying North at 120mph encounters a cross wind of 36mph. What
is the true velocity over the ground. If the plane continues on its
present course for 4 hours, how far off the course will it have
traveled?

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Clarification of Question by b27strong-ga on 18 Oct 2004 09:21 PDT

A biplane flying North at 120mph encounters a cross wind of 36mph. What
is the true velocity over the ground. If the plane continues on its
present course for 4 hours, how far off the course will it have
traveled?

It depends on the shape of the plane.  That is not a legitimate question.