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Answer:
211.89 km/h
Explanation:
Given that,
The speed of an airplance in North direction = 200 km/h
Speed in East direction = 70 km/h
We need to find the resultant speed of the airplane. It can be calculated as the resultant of the two velocities as follows :
[tex]v=\sqrt{200^2+70^2} \\\\=211.89\ km/h[/tex]
So, the required speed is 211.89 km/h.