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4. An airplane is heading due north at a speed of 300 km/h. If a wind begins blowing from the southwest (45 E of N)

4. An airplane is heading due north at a speed of 300 km/h. If a wind begins blowing from the southwest (45 E of N) at a speed of 50 km/h, what is the resultant velocity of the plane? (ans: 337 km/h, at 6 E of N)

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